(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

Name two forms of sea energy.

Name the major constituent of natural gas.

Define metre according to the old definition.

Define metre in terms of the wavelength of light.

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

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

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

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

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

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.

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.

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.

In figure for vernier callipers, calculate the length recorded.

(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.

(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.

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.

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.

Who invented vernier callipers?

What is the need for measuring length with vernier callipers?

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