vernier caliper viva questions

 Vernier Calliper Viva Voce Class 11th Physics

Q.1 What is the object of your experiment ?

Ans. Determination of  Volume of Solid Cylinder Capacity of Test Tube Using Vernier Calliper

Q.2 What is a Vernier Callipers ?

 

Ans. It is a simple instrument by which length of an object can be measured accurately up to one-tenth or one-hundredth of a centimetre.

Q.3 Why is the vernier callipers so called?

Ans. A French Mathematician named Pierre Vernier invented it and it is named after him.

Q.4 What is the other name of vernier callipers?

Ans. Vernier Callipers is also called slide callipers.

Q.5 What is the advantage of a vernier callipers over an ordinary scale?

Ans. With the help of ordinary scale precise length cannot be measured. but with vernier callipers the length can be measured accurately up to one-tenth of a millimetre or one-hundredth of a centimetre.

Q6. The upper jaws are used for measuring the inner diameter and depth gauge

Ans. is used for measuring the depth.

What is a least count or vernier constant and how will you determine it?

Q 7. The difference between 1 main scale division and 1 vernier scale division is

Ans. called the least count or vernier constant and is equal to

Least Count or Vernier Constant-value of smallest division on the main scale

no. of divisionson vernier scale

and it is usually equal to 0.01 cm.

Q.8 What is meant by zero error?

Ans. It is the error arising out of the non-coincidence of the two zeros (zero of main

scale and zero of vernier scale) when jaws of vernier callipers are in closed

position.

When is the zero error positive, negative or zero?

Q 9. When the zero of vernier scale coincides with the zero of the main scale, the

Ans.

error is zero.

When the zero of the vernier scale is to the right of the zero of the main scale,

the error is positive as it gives a reading greater than the true reading.

When the zero of the vernier scale is to the left of the zero of the main scale,

the error is negative as it gives a reading less than the true reading.

Q 10. How can you calculate the correct reading using vernier callipers?

Ans. The correct reading is obtained by subtracting the zero error from the observed

reading algebraically, i.e.,

Correct reading Observed reading-(+ Zero error)

Q 11. What is the degree of accuracy of vernier callipers?

Ans. The degree of accuracy of vernier callipers is one-tenth of a millimetre.

Q 12. How does temperature affect the length of a cylinder?

Ans. The length of a cylinder increases with the increase of temperature and

decreases with the decrease of temperature.

Q 13. Name the instruments in which vernier is used most commonly.

Ans. It is commonly used in microscopes, telescopes, sextant, polarimeter, eve.

Q 14. What is a cylinder and what is its volume?

Ans. It is a solid generated by the rotation of a rectangle about one of its sides as

axis. The volume of a cylinder is equal to V = t r2L, where Vis volume, r is

radius and L is length of cylinder.

Q 15. What is the unit of volume?

Ans. In MKS system, the unit of volume is m. In CGS system, the unit of volume

is cm. În FPS system, the unit of volume is ft3.