The nucleus of an atom contains MCQ with Answer and Explanation

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The nucleus of an atom contains

A. Protons and neutrons

B. Electrons and protons

C. Electrons and neutrons

D. Only neutrons

Answer: Option A

Solution (By JKSSB Mock Tests)

Protons (positive), neutrons (neutral). Electrons orbit outside. Hydrogen nucleus only proton. Heavy elements have more neutrons.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1

The principle of a pressure cooker is

A. Decrease in pressure raises boiling point

B. Increase in pressure lowers boiling point

C. No effect on boiling point

D. Increase in pressure raises boiling point

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Correct Answer: Option D

Explanation:
Higher pressure inside, boiling point >100°C, food cooks faster.

This question belongs to: Science Physics

Question #2

The unit of electric power is

A. Ampere

B. Joule

C. Ohm

D. Watt

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Correct Answer: Option D

Explanation:
Watt (W) = J/s = V×A. Commercial unit kilowatt-hour (energy). Joule is energy. Ohm resistance. Ampere current.

This question belongs to: Science Physics

Question #3

The gravitational constant G was first measured by

A. Galileo

B. Kepler

C. Cavendish

D. Newton

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Correct Answer: Option C

Explanation:
Henry Cavendish used torsion balance to determine G.

This question belongs to: Science Physics

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