A radioactive nucleus emits a beta particle. Its atomic number MCQ with Answer and Explanation

Question

Share Report Error

A radioactive nucleus emits a beta particle. Its atomic number

A. Decreases by 2

B. Remains same

C. Decreases by 1

D. Increases by 1

Answer: Option D

Solution (By JKSSB Mock Tests)

β⁻ decay: neutron → proton + electron, Z increases by 1.

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 moderator used in a nuclear reactor serves to

A. Cool the reactor

B. Generate neutrons

C. Slow down neutrons

D. Absorb neutrons

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Moderator slows fast neutrons to thermal energies.

This question belongs to: Science Physics

Question #2

A current of 5 A flows through a 10 Ω resistor for 2 minutes. Heat produced in kJ is

A. 30 kJ

B. 5 kJ

C. 12 kJ

D. 1 kJ

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
H = I² R t = 25 × 10 × 120 = 30000 J = 30 kJ.

This question belongs to: Science Physics

Question #3

Heat required to convert 1 g of ice at 0°C to water at 0°C is (latent heat 80 cal/g)

A. 80 cal

B. 540 cal

C. 100 cal

D. 1 cal

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Latent heat of fusion of ice = 80 cal/g. So 1 g needs 80 cal. No temperature change.

This question belongs to: Science Physics

Explore All Physics MCQs