A lens which is thicker at center and thinner at edges is MCQ with Answer and Explanation

Question

Share Report Error

A lens which is thicker at center and thinner at edges is

A. Convex

B. Plano-concave

C. Concave

D. Cylindrical

Answer: Option A

Solution (By JKSSB Mock Tests)

Convex lens converges light, thicker centre.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

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

Practice More Physics Questions

Question #1

The power dissipated in a pure inductor in AC circuit is

A. V²/R

B. VI

C. I²R

D. Zero

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Phase difference 90°, power factor zero, average power zero.

This question belongs to: Science Physics

Question #2

The process of splitting a heavy nucleus into lighter nuclei is

A. Transmutation

B. Radioactive decay

C. Fusion

D. Fission

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Fission, e.g., U-235 splitting.

This question belongs to: Science Physics

Question #3

A radioactive sample has a half-life of 5 years. What fraction of the original active nuclei will remain undecayed after 15 years?

A. 1/3

B. 1/15

C. 1/2

D. 1/8

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
The number of half-lives (n) that have passed is total time / half-life = 15 / 5 = 3 half-lives. The fraction of the sample remaining undecayed is given strictly by the formula (1/2)^n. Therefore, the fraction remaining is (1/2)^3 = 1/2 * 1/2 * 1/2 = 1/8.

This question belongs to: Science Physics

Explore All Physics MCQs