Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-2>Q 3

EASY

NEET

IMPORTANT

Earn 100

Two full turns of the circular scale of a screw gauge cover a distance of $1 mm$ on its main scale. The total number of divisions on the circular scale is $50$ . Further, it is found that the screw gauge has a zero error of $- 0.03 mm$ . While measuring the diameter of a thin wire, a student noted the main scale reading as $3 mm$ and the number of circular scale divisions in line with the main scale as $35$ . The diameter of the wire is,

50% studentsanswered this correctly

Important Questions on Experiments in Physics

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-2>Q 4

An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment, the distance is measured by,

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-3>Q 1

A student measured the diameter of a small steel ball using a screw gauge of the least count

0.001 cm .

The main scale reading is

5 mm

and zero of circular scale division coincides with

25

divisions above the reference level. If screw gauge has a zero error of

- 0.004 cm,

the correct diameter of the ball is

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-3>Q 2

In an experiment, the angles are required to be measured using an instrument.

29

divisions of the main scale exactly coincide with the

30

divisions of the vernier scale. If the smallest division of the main scale is half-a-degree

(0.5 °)

, then the least count of the instrument is,

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-3>Q 3

A screw gauge gives the following reading when used to measure the diameter of a wire :
Main scale reading :

0 mm

Circular scale reading :

52

divisions
Given that

1

mm on the main scale corresponds to

100

divisions of the circular scale.
The diameter of the wire from the above data is

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-3>Q 4

The pitch and the number of divisions, on the circular scale, for a given screw gauge are

0.5 mm

and

100

respectively. When the screw gauge is fully tightened without any object, the zero of its circular scale lies

3

divisions below the mean line. The readings of the main scale and the circular scale, for a thin sheet are

5.5 mm

and

48

respectively, the thickness of this sheet is:

HARD

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 1 - Experiments in Physics>Exercise-3>Q 5

The least count of the main scale of a screw gauge is

1 mm

. The minimum number of divisions on its circular scale required to measure

5 μ m

diameter of a wire is