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

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?

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.

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.

For what range of measurement is micrometre screw gauge used?

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

Sleeve cylinder

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

Sleeve scale

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

Thimble

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

Thimble scale

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

Baseline

What is the function of ratchet in the screw gauge?

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

State the formula for calculating the pitch of screw.

State the formula for calculating the least count of screw.

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

Zero error

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

Positive zero error

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

Negative zero error

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

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

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

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.