# Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 chapter 1 - Measurements and Experimentation [Latest edition]

## Chapter 1: Measurements and Experimentation

Unit 1 Exercise 1 (A) Objective QuestionsUnit 1 Exercise 1 (B) Subjective QuestionsUnit 2 Practice Problems 1Unit 2 Exercise 2Unit 3 Practice Problems 1Unit 3 Practice Problems 2Unit 3 Practice Problems 3Unit 3 Practice Problems 4Unit 3 Exercise 3Unit 4 Practice Problems 1Unit 4 Practice Problems 2Unit 4 Practice Problems 3Unit 4 Practice Problems 4Unit 4 Exercise 4Unit 5 Exercise 5Unit 6 Practice problems 1Unit 6 Practice problems 2Unit 6 Practice problems 3Unit 6 Practice problems 4Unit 6 Exercise 6Unit 7 Exercise 7
Unit 1 Exercise 1 (A) Objective Questions

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 1 Exercise 1 (A) Objective Questions

Unit 1 Exercise 1 (A) Objective Questions | Q 1

Select the correct option:

Which of the following is not a fundamental unit?

• Second

• Ampere

• Candela

• Newton

Unit 1 Exercise 1 (A) Objective Questions | Q 2

Select the correct option:

Which of the following is a fundamental unit?

• m/s2

• Joule

• Newton

• metre

Unit 1 Exercise 1 (A) Objective Questions | Q 3

Select the correct option:

Which is not a unit of distance?

• metre

• millimetre

• Leap year

• kilometre

Unit 1 Exercise 1 (A) Objective Questions

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 1 Exercise 1 (A) Objective Questions

Unit 1 Exercise 1 (A) Objective Questions | Q 1

Fill in the blank:

The unit is which we measure the quantity is called ________.

Unit 1 Exercise 1 (A) Objective Questions | Q 2

Fill in the blank:

One light-year is equal to _______.

Unit 1 Exercise 1 (A) Objective Questions | Q 3

Complete the following:

1 mean solar day = _______ s.

Unit 1 Exercise 1 (A) Objective Questions | Q 4

Fill in the blank:

One year = _______ sec

Unit 1 Exercise 1 (A) Objective Questions | Q 5

Fill in the blank:

One micrometre = __________ m.

Unit 1 Exercise 1 (B) Subjective Questions

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 1 Exercise 1 (B) Subjective Questions

Unit 1 Exercise 1 (B) Subjective Questions | Q 1

What do you understand by the term measurement?

Unit 1 Exercise 1 (B) Subjective Questions | Q 2.1

What do you understand by the term unit?

Unit 1 Exercise 1 (B) Subjective Questions | Q 2.2

What do you understand by the term magnitude, as applied to a physical quantity?

Unit 1 Exercise 1 (B) Subjective Questions | Q 3

A body measures 25 m. State the unit and the magnitude of the unit in the statement.

Unit 1 Exercise 1 (B) Subjective Questions | Q 4

State four characteristics of a standard unit.

Unit 1 Exercise 1 (B) Subjective Questions | Q 5.1

Define a fundamental unit.

Unit 1 Exercise 1 (B) Subjective Questions | Q 5.2

Name fundamental units of mass; length; time; current and temperature.

Unit 1 Exercise 1 (B) Subjective Questions | Q 6.1

What do you understand by the term derived unit?

Unit 1 Exercise 1 (B) Subjective Questions | Q 6.2

Give three examples of derived units.

Unit 1 Exercise 1 (B) Subjective Questions | Q 7.1

Define metre according to the old definition.

Unit 1 Exercise 1 (B) Subjective Questions | Q 7.2

Define metre in terms of the wavelength of light.

Unit 1 Exercise 1 (B) Subjective Questions | Q 7.3

Why is the metre length in terms of the wavelength of light considered more accurate?

Unit 1 Exercise 1 (B) Subjective Questions | Q 8.1

Name the convenient unit you will use to measure:

length of a hall

Unit 1 Exercise 1 (B) Subjective Questions | Q 8.2

Name the convenient unit you will use to measure:

width of a book

Unit 1 Exercise 1 (B) Subjective Questions | Q 8.3

Name the convenient unit you will use to measure:

diameter of hair

Unit 1 Exercise 1 (B) Subjective Questions | Q 8.4

Name the convenient unit you will use to measure:

distance between the two cities.

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.1

Define mass.

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.2

State the unit in which mass is measured in C.GS. system.

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.2

State the unit in which mass is measured in S.I. system.

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.3

Name the most convenient unit of mass you will use to measure:

Mass of small amount of medicine.

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.3

Name the most convenient unit of mass you will use to measure:

The grain output of a state

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.3

Name the most convenient unit of mass you will use to measure:

The bag of sugar

Unit 1 Exercise 1 (B) Subjective Questions | Q 9.3

Name the most convenient unit of mass you will use to measure:

Mass of a cricket ball.

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.1

Define time.

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

Solar day

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

Mean solar day

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

An hour

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

Minute

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

Second

Unit 1 Exercise 1 (B) Subjective Questions | Q 10.2

State or define the following term:

Year

Unit 2 Practice Problems 1

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 2 Practice Problems 1

Unit 2 Practice Problems 1 | Q 1

A student calculates experimentally the value of density of iron as 7.4 gcm−3. If the actual density of iron is 7.6 gcm−3, calculate the percentage error in the experiment.

Unit 2 Practice Problems 1 | Q 2

A student finds that the boiling point of water in a particular experiment is 97.8°C. If the actual boiling point of water is 99.4°C, calculate the percentage error.

Unit 2 Practice Problems 1 | Q 3

A pupil determines the velocity of sound as 320 ms−1. If the actual velocity of sound is 332 ms−1, calculate the percentage error.

Unit 2 Exercise 2

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 2 Exercise 2

Unit 2 Exercise 2 | Q 1.1

What do you understand by the term order of magnitude of a quantity?

Unit 2 Exercise 2 | Q 1.2

Why are physical quantities expressed in the order of magnitude? Support your answer by an example.

Unit 2 Exercise 2 | Q 2.1

Express the order of magnitude of the following quantity:

12578935 m

Unit 2 Exercise 2 | Q 2.2

Express the order of magnitude of the following quantity:

222444888 kg

Unit 2 Exercise 2 | Q 2.3

Express the order of magnitude of the following quantity:

0.000,000,127 s

Unit 2 Exercise 2 | Q 2.4

Express the order of magnitude of the following quantity:

0.000,000,000,00027 m

Unit 2 Exercise 2 | Q 3.1

What do you understand by the term degree of accuracy?

Unit 2 Exercise 2 | Q 3.2

Amongst the various physical measurements recorded in an experiment, which physical measurement determines the degree of accuracy?

Unit 2 Exercise 2 | Q 4.1

State the formula for calculating percentage error

Unit 2 Exercise 2 | Q 4.2

Is it possible to increase the degree of accuracy by mathematical manipulations? Support your answer by an example.

Unit 2 Exercise 2 | Q 5

State the factors which determine the number of significant figures for the calculation of the final result of an experiment.

Unit 2 Exercise 2 | Q 6.1

The final result of the calculation in an experiment is 125,347,200. Express the number in term of significant place when accuracy is between 1 and 10

Unit 2 Exercise 2 | Q 6.2

The final result of the calculation in an experiment is 125,347,200. Express the number in term of significant place when accuracy is between 1 and 100

Unit 2 Exercise 2 | Q 6.3

The final result of the calculation in an experiment is 125,347,200. Express the number in term of significant place when accuracy is between 1 and 1000

Unit 3 Practice Problems 1

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 3 Practice Problems 1

Unit 3 Practice Problems 1 | Q 1

The main scale of vernier callipers has 10 divisions in a centimetre and 10 vernier scale divisions coincide with 9 main scale divisions. Calculate

1. pitch
2. L.C. of vernier callipers.
Unit 3 Practice Problems 1 | Q 2

In a vernier callipers, 19 main scale divisions coincide with 20 vernier scale divisions. If the main scale has 20 divisions in a centimetre, calculate

1. pitch
2. L.C. of vernier callipers.
Unit 3 Practice Problems 2

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 3 Practice Problems 2

Unit 3 Practice Problems 2 | Q 1

Figure shows the position of vernier scale while measuring the external length of a wooden cylinder.

1. What is the length recorded by the main scale?
2. Which reading of vernier scale coincides with the main scale?
3. Calculate the length.
Unit 3 Practice Problems 2 | Q 2

In figure for vernier callipers, calculate the length recorded.

Unit 3 Practice Problems 3

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 3 Practice Problems 3

Unit 3 Practice Problems 3 | Q 1

(a) A vernier scale has 10 divisions. It slides over the main scale, whose pitch is 1.0 mm. If the number of divisions on the left hand of zero of the vernier scale on the main scale is 56 and the 8th vernier scale division coincides with the main scale, calculate the length in centimetres.
(b) If the above instrument has a negative error of 0.07 cm, calculate the corrected length.

Unit 3 Practice Problems 3 | Q 2

(a) A vernier scale has 20 divisions. It slides over the main scale, whose pitch is 0.5 mm. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with the main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers.
(b) If the vernier has a negative error of 0.04 cm, calculate the corrected radius of the sphere.

Unit 3 Practice Problems 4

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 3 Practice Problems 4

Unit 3 Practice Problems 4 | Q 1

The least count of a vernier callipers is 0.0025 cm and it has an error of + 0.0125 cm. While measuring the length of a cylinder, the reading on the main scale is 7.55 cm, and the 12th vernier scale division coincides with the main scale. Calculate the corrected length.

Unit 3 Practice Problems 4 | Q 2

The least count of a vernier callipers is 0.01 cm and it has an error of + 0.07 cm. While measuring the radius of a sphere, the main scale reading is 2.90 cm and the 5th vernier scale division coincides with the main scale. Calculate the correct radius.

Unit 3 Exercise 3

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 3 Exercise 3

Unit 3 Exercise 3 | Q 1

Who invented vernier callipers?

Unit 3 Exercise 3 | Q 2

What is the need for measuring length with vernier callipers?

Unit 3 Exercise 3 | Q 3

Up to how many decimal places can a common vernier callipers measure the length in cm?

Unit 3 Exercise 3 | Q 4.1

Define the term pitch.

Unit 3 Exercise 3 | Q 4.2

Define the term least count as applied to a vernier callipers.

Unit 3 Exercise 3 | Q 5.1

State the formula for determining a pitch

Unit 3 Exercise 3 | Q 5.2

State the formula for determining least count for a vernier callipers.

Unit 3 Exercise 3 | Q 6.1

State the formula for calculating length if:

Number of vernier scale division coinciding with the main scale and number of division of main scale on the left-hand side of zero of vernier scale is known.

Unit 3 Exercise 3 | Q 6.2

State the formula for calculating length if:

The reading of the main scale is known and the number of vernier scale divisions coinciding with the main scale is known.

Unit 3 Exercise 3 | Q 7.1

What do you understand by the term zero error?

Unit 3 Exercise 3 | Q 7.2

When does a vernier callipers has the positive error?

Unit 3 Exercise 3 | Q 7.2

When does a vernier callipers has the negative error?

Unit 3 Exercise 3 | Q 7.3

State the correction if the positive error is 7 divisions when the least count is 0.01 cm.

Unit 3 Exercise 3 | Q 7.3

State the correction if the negative error is 7 divisions when the least count is 0.01 cm.

Unit 3 Exercise 3 | Q 8.1

Which part of vernier callipers is used to measure the external diameter of a cylinder?

Unit 3 Exercise 3 | Q 8.2

Which part of vernier callipers is used to measure the internal diameter of a hollow cylinder?

Unit 3 Exercise 3 | Q 8.3

Which part of vernier callipers is used to measure the internal length of a hollow cylinder?

Unit 4 Practice Problems 1

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 4 Practice Problems 1

Unit 4 Practice Problems 1 | Q 1

The circular scale of a screw gauge has 50 divisions. Its spindle moves by 2 mm on the sleeve, when given four complete rotations calculate

1. pitch
2. least count
Unit 4 Practice Problems 1 | Q 2

The circular scale of a screw gauge has 100 divisions. Its spindle moves forward by 2.5 mm when given five complete turns. Calculate

1. pitch
2. least count of the screw gauge
Unit 4 Practice Problems 2

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 4 Practice Problems 2

Unit 4 Practice Problems 2 | Q 1

Figure shows a screw gauge in which circular scale has 200 divisions. Calculate the least count and radius of the wire.

Unit 4 Practice Problems 2 | Q 2

Figure shows a screw gauge in which circular scale has 100 divisions. Calculate the least count and the diameter of a wire.

Unit 4 Practice Problems 3

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 4 Practice Problems 3

Unit 4 Practice Problems 3 | Q 1

A micrometre screw gauge having a positive zero error of 5 divisions is used to measure diameter of a wire, when reading on the main scale is 3rd division and the 48th circular scale division coincides with baseline. If the micrometer has 10 divisions to a centimetre on the main scale and 100 divisions on a circular scale, calculate

1. Pitch of screw
2. Least count of screw
3. Observed diameter
4. Corrected diameter.
Unit 4 Practice Problems 3 | Q 2

A micrometre screw gauge has a positive zero error of 7 divisions, such that its main scale is marked in 1/2 mm and the circular scale has 100 divisions. The spindle of the screw advances by 1 division complete rotation.
If this screw gauge reading is 9 divisions on the main scale and 67 divisions on the circular scale for the diameter of a thin wire, calculate

1. Pitch
2. L.C.
3. Observed diameter
4. Corrected diameter
Unit 4 Practice Problems 3 | Q 3

The thimble of a screw gauge has 50 divisions for one rotation. The spindle advances 1 mm when the screw is turned through two rotations.

1. What is the pitch of the screw?
2. What is the least count of screw gauge?
3. When the screw gauge is used to measure the diameter of wire the reading on the sleeve is found to be 0.5 mm and reading on thimble is found, 27 divisions. What is the diameter of the wire in centimetres?
Unit 4 Practice Problems 4

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 4 Practice Problems 4

Unit 4 Practice Problems 4 | Q 1

A micrometre screw gauge has a negative zero error of 8 divisions. While measuring the diameter of a wire the reading on the main scale is 3 divisions and the 24th circular scale division coincides with baseline.
If the number of divisions on the main scale are 20 to a centimetre and circular scale has 50 divisions, calculate

1. pitch
2. observed diameter.
3. least count
4. corrected diameter.
Unit 4 Practice Problems 4 | Q 2

A micrometre screw gauge has a negative zero error of 7 divisions. While measuring the diameter of a wire the reading on the main scale is 2 divisions and 79th circular scale division coincides with baseline.
If the number of divisions on the main scale is 10 to a centimetre and circular scale has 100 divisions, calculate

1. pitch
2. observed diameter
3. least count
4. corrected diameter.
Unit 4 Exercise 4

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 4 Exercise 4

Unit 4 Exercise 4 | Q 1

For what range of measurement is micrometre screw gauge used?

Unit 4 Exercise 4 | Q 2.1

What do you understand by the following term as applied to micrometre screw gauge?

Sleeve cylinder

Unit 4 Exercise 4 | Q 2.2

What do you understand by the following term as applied to micrometre screw gauge?

Sleeve scale

Unit 4 Exercise 4 | Q 2.3

What do you understand by the following term as applied to micrometre screw gauge?

Thimble

Unit 4 Exercise 4 | Q 2.4

What do you understand by the following term as applied to micrometre screw gauge?

Thimble scale

Unit 4 Exercise 4 | Q 2.5

What do you understand by the following term as applied to micrometre screw gauge?

Baseline

Unit 4 Exercise 4 | Q 3

What is the function of ratchet in the screw gauge?

Unit 4 Exercise 4 | Q 4.1

Define the term pitch.

Unit 4 Exercise 4 | Q 4.2

What do you understand by the term least count of screw?

Unit 4 Exercise 4 | Q 5.1

State the formula for calculating the pitch of screw.

Unit 4 Exercise 4 | Q 5.2

State the formula for calculating the least count of screw.

Unit 4 Exercise 4 | Q 6.1

What do you understand by the following term as applied to screw gauge?

Zero error

Unit 4 Exercise 4 | Q 6.2

What do you understand by the following term as applied to screw gauge?

Positive zero error

Unit 4 Exercise 4 | Q 6.3

What do you understand by the following term as applied to screw gauge?

Negative zero error

Unit 4 Exercise 4 | Q 7.1

How do you account for positive zero error for calculating the correct diameter of wires?

Unit 4 Exercise 4 | Q 7.2

How do you account for negative zero error, for calculating the correct diameter of wires?

Unit 5 Exercise 5

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 5 Exercise 5

Unit 5 Exercise 5 | Q 1.1

What do you understand by the term volume of substance?

Unit 5 Exercise 5 | Q 1.2

State the unit of volume in the SI system.

Unit 5 Exercise 5 | Q 2

How is the SI system of the unit of volume is related to 1 litre? Explain.

Unit 5 Exercise 5 | Q 3.1

In which unit, the volume of liquid is measured?

Unit 5 Exercise 5 | Q 3.2

How is this unit is related to S.I. unit of volume?

Unit 5 Exercise 5 | Q 4

Explain the method in steps to find the volume of an irregular solid with the help of a measuring cylinder.

Unit 5 Exercise 5 | Q 5.1

Amongst the unit of volume which is most suitable for measuring:

Volume of a swimming tank

• cm3

• m3

• litre

• millilitre

Unit 5 Exercise 5 | Q 5.2

Amongst the unit of volume which is most suitable for measuring:

Volume of a glass filled with milk

• cm3

• m3

• litre

• millilitre

Unit 5 Exercise 5 | Q 5.3

Amongst the unit of volume which is most suitable for measuring:

Volume of an exercise book

• cm3

• m3

• litre

• millilitre

Unit 5 Exercise 5 | Q 5.4

Amongst the unit of volume which is most suitable for measuring:

Volume of air in the room

• cm3

• m3

• litre

• millilitre

Unit 5 Exercise 5 | Q 6

Find the volume of a book of length 25 cm, breadth 18 cm and height 2 cm in m3.

Unit 5 Exercise 5 | Q 7

The level of water in a measuring cylinder is 12.5 ml. When a stone is lowered in it, the volume is 21.0 ml. Find the volume of the stone.

Unit 5 Exercise 5 | Q 8

A measuring cylinder is filled with water up to a level of 30 ml. A solid body is immersed in it so that the level of water rises to 37 ml. Now the solid body is tied with a cork and then immersed in water so that the water level rises to 40 ml. Find the volume of the solid body and the cork.

Unit 6 Practice problems 1

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 6 Practice problems 1

Unit 6 Practice problems 1 | Q 1

Calculate the time period of a simple pendulum of length 0. 84 m when g = 9.8 ms−2.

Unit 6 Practice problems 1 | Q 2

Calculate the time period of a simple pendulum of length 1.44 m on the surface of the moon. The acceleration due to gravity on the surface of the moon is 1/6 the acceleration due to gravity on earth, [g = 9.8 ms−2]

Unit 6 Practice problems 2

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 6 Practice problems 2

Unit 6 Practice problems 2 | Q 1

Length of the second’s pendulum is 100 cm. Find the length of another pendulum whose time period is 2.4 s.

Unit 6 Practice problems 2 | Q 2

A pendulum of length 36 cm has a time period of 1.2 s. Find the time period of another pendulum, whose length is 81 cm.

Unit 6 Practice problems 2 | Q 3

Calculate the length of the second’s pendulum on the surface of the moon when acceleration due to gravity on the moon is 1.63 ms−2.

Unit 6 Practice problems 3

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 6 Practice problems 3

Unit 6 Practice problems 3 | Q 1

The length of the two pendulum are 110 cm and 27.5 cm. Calculate the ratio of their time periods.

Unit 6 Practice problems 3 | Q 2

A pendulum of 100 cm and another pendulum 4 cm long are oscillating at the same time. Calculate the ratio of their time periods.

Unit 6 Practice problems 4

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 6 Practice problems 4

Unit 6 Practice problems 4 | Q 1

The time periods of two pendulums are 1.44 s and 0.36 s respectively. Calculate the ratio of their lengths.

Unit 6 Practice problems 4 | Q 2

The time period of the two pendulums are 2 s and 3 s respectively. Find the ratio of their lengths.

Unit 6 Exercise 6

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 6 Exercise 6

Unit 6 Exercise 6 | Q 1.1

Define simple pendulum.

Unit 6 Exercise 6 | Q 1.2

State two factors which determine the time period of a simple pendulum.

Unit 6 Exercise 6 | Q 1.3

Write an expression for the time period of a simple pendulum.

Unit 6 Exercise 6 | Q 2.1

Define the following in connection with a simple pendulum.

Time period

Unit 6 Exercise 6 | Q 2.2

Define the terms : oscillation

Unit 6 Exercise 6 | Q 2.3

Define the term amplitude.

Unit 6 Exercise 6 | Q 2.4

Define the following in connection with a simple pendulum.

Effective length

Unit 6 Exercise 6 | Q 3.1

What is a second's pendulum?

Unit 6 Exercise 6 | Q 3.2

A second’s pendulum is taken on the surface of the moon where the acceleration due to gravity is l/6th of that of earth. Will the time period of pendulum remain the same or increase or decrease? Give a reason.

Unit 6 Exercise 6 | Q 4

Which of the following do not affect the time period of a simple pendulum?

1. mass of bob
2. size of bob
3. effective length of pendulum
4. acceleration due to gravity
5. amplitude.
Unit 6 Exercise 6 | Q 5

A simple pendulum is hollow from within and its time period is T. How is the time period of pendulum affected when :

1. 1/4 of bob is filled with mercury
2. 3/4 of bob is filled with mercury
3. The bob is completely filled with mercury?
Unit 6 Exercise 6 | Q 6

Two simple pendulums A and B have equal lengths, but their bobs weigh 50 gf and 100 gf, respectively. What would be the ratio of their time periods? Give reasons for your answer.

Unit 6 Exercise 6 | Q 7

State the numerical value of the frequency of oscillation of a second's pendulum. Does it depend on the amplitude of oscillations?

Unit 6 Exercise 6 | Q 8.1

State two factors which determine the time period of a simple pendulum.

Unit 6 Exercise 6 | Q 8.2

Name the device commonly used to measure mass.

Unit 6 Exercise 6 | Q 8.2

Name the device commonly used to measure weight of a body.

Unit 6 Exercise 6 | Q 9

Draw a graph of l, the length of simple pendulum against T2, the square of its time period.

Unit 6 Exercise 6 | Q 10.1

Define the term amplitude.

Unit 6 Exercise 6 | Q 10.2

What do you understand by frequency of oscillations of simple pendulum?

Unit 7 Exercise 7

### Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 Chapter 1 Measurements and Experimentation Unit 7 Exercise 7

Unit 7 Exercise 7 | Q 1.1

What do you understand by the term graph?

Unit 7 Exercise 7 | Q 1.2

What do you understand by the term independent variable?

Unit 7 Exercise 7 | Q 1.2

What do you understand by the term dependent variable?

Unit 7 Exercise 7 | Q 1.3

Amongst the independent variable and dependent variable, which is plotted on X-axis?

Unit 7 Exercise 7 | Q 2.1

State how will you choose a scale for the graph.

Unit 7 Exercise 7 | Q 2.2

State the two ratios of a scale, which are suitable for plotting points.

Unit 7 Exercise 7 | Q 2.3

State the two ratios of a scale, which are not suitable for plotting points.

Unit 7 Exercise 7 | Q 3

State three important precautions which must be followed while plotting points on a graph.

Unit 7 Exercise 7 | Q 4

State two important precautions for drawing a graph line.

Unit 7 Exercise 7 | Q 5.1

What is a best fit line for a graph?

Unit 7 Exercise 7 | Q 5.2

What does the best fit line show regarding the variables plotted and the work of the experimenter?

Unit 7 Exercise 7 | Q 6.1

What do you understand by the term constant of proportionality?

Unit 7 Exercise 7 | Q 6.2

How can proportionality constant be determined from the best fit straight line graph?

Unit 7 Exercise 7 | Q 7

State three uses of a graph.

Unit 7 Exercise 7 | Q 8

How does a graph help in determining the proportional relationship between the two quantities?

## Chapter 1: Measurements and Experimentation

Unit 1 Exercise 1 (A) Objective QuestionsUnit 1 Exercise 1 (B) Subjective QuestionsUnit 2 Practice Problems 1Unit 2 Exercise 2Unit 3 Practice Problems 1Unit 3 Practice Problems 2Unit 3 Practice Problems 3Unit 3 Practice Problems 4Unit 3 Exercise 3Unit 4 Practice Problems 1Unit 4 Practice Problems 2Unit 4 Practice Problems 3Unit 4 Practice Problems 4Unit 4 Exercise 4Unit 5 Exercise 5Unit 6 Practice problems 1Unit 6 Practice problems 2Unit 6 Practice problems 3Unit 6 Practice problems 4Unit 6 Exercise 6Unit 7 Exercise 7

## Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 chapter 1 - Measurements and Experimentation

Goyal Brothers Prakashan solutions for Class 9 A New Approach to ICSE Physics Part 1 chapter 1 (Measurements and Experimentation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Class 9 A New Approach to ICSE Physics Part 1 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 9 A New Approach to ICSE Physics Part 1 chapter 1 Measurements and Experimentation are Unit Systems, International System of Units (SI System), Vernier Callipers, Simple Pendulum for Time, Measurements Using Common Instruments, Measurements, Physical Quantities, Unit and Its Types, Unit Prefixes, Measuring Smaller Distances, Measuring Larger Distances, Measurement of Time, Rules and Conventions for Writing SI Units and Their Symbols, Principle of Vernier, Screw Gauge, Principle of Screw Gauge, A Time Period of Oscillation and Frequency, Measurement of Length, Measurement of Mass.

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