Which particle has no charge? MCQ with Answer and Explanation

Which particle has no charge?

A. Neutron

B. Proton

C. Alpha particle

D. Electron

Answer: Option A

Solution (By JKExamLibrary)

Neutron is neutral (charge 0). Proton +e, electron -e. Alpha particle +2e. Neutron mass slightly more than proton. Discovered by Chadwick.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The diameter of an atom is approximately

A. 10⁻¹⁵ m

B. 10⁻³ m

C. 10⁻¹⁰ m

D. 10⁻⁶ m

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Correct Answer: Option C

Explanation:
Atomic diameter ~ 1 Å = 10⁻¹⁰ m. Nucleus is 10⁻¹⁵ m (femtometre). Atomic size determined by electron cloud. 10⁻⁶ m is typical cell size. 10⁻³ m is millimetre.

This question belongs to: Science Physics

Question #2 Report Error

The instrument used to measure the humidity of air is

A. Anemometer

B. Barometer

C. Hydrometer

D. Hygrometer

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Correct Answer: Option D

Explanation:
Hygrometer measures relative humidity. Wet and dry bulb, hair hygrometer. Hydrometer measures liquid density. Anemometer wind speed. Barometer pressure.

This question belongs to: Science Physics

Question #3 Report Error

The direction of magnetic field lines inside a bar magnet is

A. Same as outside

B. South to North

C. North to South

D. Random

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Correct Answer: Option B

Explanation:
Outside magnet, lines from North to South. Inside magnet, they go from South to North, forming closed loops. Magnetic field lines continuous, no start/end.

This question belongs to: Science Physics

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