A vernier caliper has 20 divisions on vernier scale matching 19 main scale divisions. If main scale division is 1 mm, least count is: MCQ with Answer and Explanation

Question Report Error

A vernier caliper has 20 divisions on vernier scale matching 19 main scale divisions. If main scale division is 1 mm, least count is:

A. 0.1 mm

B. 0.5 mm

C. 0.05 mm

D. 0.01 mm

Answer: Option C

Solution (By JKExamLibrary)

Least count = 1 MSD - 1 VSD. 20 VSD = 19 MSD ⇒ 1 VSD = 19/20 mm = 0.95 mm. LC = 1 - 0.95 = 0.05 mm. Formula: LC = MSD/n where n = vernier divisions. Memory tip: LC = smallest measurable difference = main scale value/vernier divisions. Essential for practical physics questions in competitive exams.

This question belongs to: Science Physics

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1 Report Error

The buoyant force on a body immersed in a fluid depends on

A. Density of body

B. Both B and C

C. Volume of body

D. Acceleration due to gravity

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Buoyant force = weight of displaced fluid = (volume of body submerged) × density_fluid × g. Depends on volume displaced and g. Not density of body.

This question belongs to: Science Physics

Question #2 Report Error

Which of the following is an SI derived unit named after a scientist?

A. Second

B. Kilogram

C. Metre

D. Pascal

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Pascal (Pa) named after Blaise Pascal, derived unit for pressure (N/m²). Metre, kilogram, second are base units. Joule, watt, newton, hertz, coulomb also named scientists.

This question belongs to: Science Physics