# Physics Set 1 2021-2022 ICSE Class 10 Question Paper Solution

Physics [Set 1]
Marks: 40 Academic Year: 2021-2022
Date: April 2022
Duration: 1h30m

Note :

1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the first 10 minutes.
3. This time is to be spent in reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answers.
5. Attempt all questions from Section A and any three questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].

SECTION - A : (Attempt all questions from this Section.)
[10] 1 | Choose the correct answers to the questions from the given options. (Do not copy the question, Write the correct answer only.)
[1] 1.i

Pendulums A, B, C and D are tied to a flexible string PQ and are at rest. Pendulum C is disturbed. Which of the following statements is true?

Only pendulum C will start vibrating.

Pendulums A, B, and D will also start vibrating but A and D will vibrate with the maximum amplitude.

Pendulums A, B, and D will also start vibrating.

Vibrations of pendulum C are forced vibrations.

Concept: Characteristics of a Sound Wave
Chapter: [0.03] Sound
[1] 1.ii

Which of the following is not a characteristic of parallel combination of resistors?

If one resistor is fused, the circuit does not become open.

The total resistance R is given by the formula 1/"R" = 1/"R"_1 + 1/"R"_2 + 1/"R"_3 ...

The total resistance becomes less than the least resistor, present in the combination.

The current through each resistor always remains the same.

Concept: System of Resistors - Parallel Connection of Series Resistors
Chapter: [0.040999999999999995] Current Electricity
[1] 1.iii

Which one of the following statements is correct?

Live wire has zero potential.

Fuse is connected in a neutral wire.

Potential of live and earth wire is always the same.

Earth wire is used to prevent electric shock.

Concept: Colour Coding of Live, Neutral, and Earth Wires
Chapter: [0.042] Electrical Power and Energy and Household Circuits
[1] 1.iv

The diagram below shows a free conductor AB is kept in a magnetic field and is carrying current from A to B. (To avoid confusion complete path of the circuit is not shown) The direction of the force experienced by the conductor will be:

Up

Down

Towards N

Towards S

Concept: Force on a Current Carrying Conductor in a Magnetic Field
Chapter: [0.043] Electro Magnetism
[1] 1.v

The diagram below shows a magnet moved near a coil along its axis. Which of the diagram shows correct flow of current during this motion?

Concept: Magnetic Field Due to a Current Carving Cylindrical Coil (or Solenoid)
Chapter: [0.043] Electro Magnetism
[1] 1.vi

The meaning of the statement ‘Specific heat capacity of water is 4200 J kg-1 K-1’ is:

Water needs 4200 J heat to raise its temperature by 1 kelvin.

To raise the temperature of water 4200 J of heat is absorbed.

1 kg water absorbs 4200 J heat to increase its temperature by 1 kelvin.

1 kg Water needs 1 kelvin temperature to absorb 4200 J heat.

Concept: Natural Phenomena and Consequences of High Specific Heat Capacity of Water
Chapter: [0.05] Heat
[1] 1.vii

200 g of ice at 0° C needs ______ heat to melt. [Specific latent heat of ice = 336000 J kg-1]

6720 J

67200 J

672000 J

67.2 J

Concept: Specific Latent Heat of Fusion of Ice
Chapter: [0.05] Heat
[1] 1.viii

The radiation with maximum penetrating power is ______.

γ

β

α

Concept: Radioactivity as Emission of Alpha, Beta, and Gamma Radiations - Properties of Gamma Radiations
Chapter: [0.06] Modern Physics
[1] 1.ix

Resonance is ______.

a forced vibration in which amplitude remains constant

a forced vibration in which frequency of forced vibration is greater than the free vibrations of the body

a forced vibration, in which frequency of forced vibration is equal to the free vibrations of the body

a forced vibration, in which frequency of forced vibration is less than the free vibrations of the body

Concept: Resonance
Chapter: [0.03] Sound
[1] 1.x

The nuclear radiation which gets deflected towards the negatively charged plate in an electric field is ______.

Gamma

Ultraviolet

Beta

Alpha

Concept: Radioactivity as Emission of Alpha, Beta, and Gamma Radiations - Properties of Alpha Particles
Chapter: [0.06] Modern Physics
SECTION - B : (Attempt any three questions from this Section.)
[10] 2
[3] 2.i

(a) Calculate the total resistance across AB.

(b) If a cell of e.m.f 2.4 V with negligible internal resistance is connected across AB then calculate the current drawn from the cell.

Concept: Internal Resistance of a Cell
Chapter: [0.040999999999999995] Current Electricity
[3] 2.ii
[1.5] 2.ii.a

Which will absorb more heat, 10 g of ice at 0° C or 10 g of water at 0° C?

Concept: Specific Latent Heat of Fusion of Ice
Chapter: [0.05] Heat
[1.5] 2.ii.b

For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?

Concept: Latent Heat and Specific Latent Heat
Chapter: [0.05] Heat
[4] 2.iii

The diagram below shows an insulated copper wire wound around a hollow cardboard cylindrical tube. Answer the questions that follow:

1. What are the magnetic poles at A and B when the key K is closed?
2. State two ways to increase the strength of the magnetic field in this coil without changing the coil.
3. If we place a soft iron bar at the centre of the hollow cardboard and replace the DC source with an AC source then will it attract small iron pins toward itself when the current is flowing through the coil?
Concept: Magnetic Field Due to a Current Carving Cylindrical Coil (or Solenoid)
Chapter: [0.043] Electro Magnetism
[10] 3
[3] 3.i

The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:

1. Calculate specific heat capacity of water.
2. Heat released in the region BC.
Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[3] 3.ii

(a) Observe the diagram given below and state whether the bulb will glow or not when we switch on K.

(b) Is it safe to handle the bulb when the switch is OFF?

(c) Give a reason for your answer in (b).

Concept: Effects of Electric Current - Heating Effect of Electric Current
Chapter: [0.042] Electrical Power and Energy and Household Circuits
[4] 3.iii
[1] 3.iii.a

Two metals A and B have specific heat capacities in the ratio 2 : 3. If they are supplied the same amount of heat then

Which metal piece will show a greater rise in temperature given their masses is the same?

Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[1] 3.iii.b

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

Which metal piece will have greater mass if the rise in temperature is the same for both metals?

Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[1] 3.iii.c

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

If the mass ratio of metal A and metal B is 3:5 then calculate the ratio in which their temperatures rise.

Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[1] 3.iii.d

Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then

If specific heat capacity of metal A is 0.26 Jg-1 0C-1 then calculate the specific heat capacity of metal B.

Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[10] 4
[3] 4.i

(a) Which one of the following graphs A or B shows free vibrations in a vacuum and which one shows free vibrations in a medium?

(b) How did you come to this conclusion.

Concept: Natural Vibrations
Chapter: [0.03] Sound
[3] 4.ii
[2] 4.ii.a

State Faraday’s laws of electromagnetic induction.

Concept: Electromagnetic Induction
Chapter: [0.043] Electro Magnetism
[1] 4.ii.b

Name one electrical device which works on Faraday's law of electromagnetic induction principle.

Concept: Transformer
Chapter: [0.043] Electro Magnetism
[4] 4.iii

A nucleus $\ce{^194_82X}$ emits an alpha particle

1. What will be the atomic number of the daughter nucleus Y?
2. What will be the number of neutrons in the daughter nucleus Y?
3. Write a nuclear reaction showing the emission of this particle.
Concept: Discovery of Charged Particles in Matter - Nucleus
Chapter: [0.06] Modern Physics
[10] 5
[3] 5.i

(a) Name the electrical appliance shown in the diagram below.

(b) Name the material of the wire used in this device.

(c) Name two important characteristics of this wire.

Concept: Electric Fuse
Chapter: [0.042] Electrical Power and Energy and Household Circuits
[3] 5.ii
1. Define pitch.
2. Two wires AB and CD of same length are stretched by same amount. Which wire will produce a sound of greater pitch on plucking?
3. Give a reason for your answer.

Concept: Characteristics of a Sound Wave
Chapter: [0.03] Sound
[4] 5.iii
[2] 5.iii.a

Why is water used as a coolant in radiators of a car?

Concept: Specific Heat Capacity
Chapter: [0.05] Heat
[2] 5.iii.b

Name the radioactive isotope used to find the age of fossils. Name the radioactive radiation which it emits?

Concept: Isotopes
Chapter: [0.06] Modern Physics
[10] 6
[3] 6.i

A beam of α, β and γ rays is travelling through a certain region in space.

1. Arrange them in ascending order of ionising power.
2. Which of the above will pass undeviated if subjected to an electric field?
3. With respect to your answer to part (b) above, what will be the change in the nucleus of an atom after such a ray is emitted.
Concept: Radioactivity as Emission of Alpha, Beta, and Gamma Radiations
Chapter: [0.06] Modern Physics
[3] 6.ii

A change in amplitude of a sound wave is noticed.

1. Which characteristic of sound is affected due to the above change?
2. How is amplitude related to your answer to part (a) above?
3. What happens to the quality of the sound?
Concept: Properties of Sounds - Quality (Or Timbre) and Wave Form
Chapter: [0.03] Sound
[4] 6.iii

An electric bulb is rated ‘240 V, 100 W’.

1. What information can you get from the above statement?
2. What will happen if this bulb is connected across 220 V?
3. Calculate the resistance of the bulb.
4. Also find the energy consumed by the bulb in 10 minutes.
Concept: Resistance (R)
Chapter: [0.040999999999999995] Current Electricity

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