Nuclear fission is the process in which MCQ with Answer and Explanation

Question

Share Report Error

Nuclear fission is the process in which

A. Electrons are emitted

B. Light nuclei combine

C. Nucleus emits gamma rays

D. Heavy nucleus splits

Answer: Option D

Solution (By JKSSB Mock Tests)

Fission: heavy nucleus (e.g., U-235) splits into smaller nuclei plus neutrons and energy. Fusion: light nuclei combine (e.g., hydrogen to helium). Both release energy. Fission used in reactors and bombs.

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

A proton and an electron enter a uniform magnetic field with same velocity perpendicular to field. Which has larger radius?

A. Depends on charge

B. Electron

C. Proton

D. Same

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
r = mv/(qB). Proton mass >> electron mass, so radius larger.

This question belongs to: Science Physics

Question #2

Assertion (A): Fuse wire has high resistance and low melting point. Reason (R): It must melt to break circuit on overload.

A. A false, R true

B. A true, R false

C. Both A and R true, R correct explanation

D. Both A and R true, R not correct explanation

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
High resistance produces more heat (I²R), low melting point ensures quick melting. Both true and R explains A.

This question belongs to: Science Physics

Question #3

A stone is dropped from a height of 80 m. Time to reach ground (g=10) is

A. 8 s

B. 2 s

C. 16 s

D. 4 s

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
h = ½gt² => 80 = 5t² => t²=16 => t=4 s.

This question belongs to: Science Physics

Explore All Physics MCQs