The centre of gravity of a uniform sphere is at MCQ with Answer and Explanation

Question Report Error

The centre of gravity of a uniform sphere is at

A. Midpoint of radius

B. Outside sphere

C. Surface

D. Geometric centre

Answer: Option D

Solution (By JKExamLibrary)

For uniform sphere, centre of gravity is at centre.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Heat transfer by fluid motion is:

A. Radiation

B. All three

C. Convection

D. Conduction

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Correct Answer: Option C

Explanation:
Convection: bulk fluid motion carries heat (natural: density-driven; forced: pump/fan). Conduction: molecular collisions; radiation: EM waves. Memory aid: 'Convection = fluid flow + heat; e.g., boiling, weather'. Heat transfer mode frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2 Report Error

The Q factor of a resonant LCR circuit is measure of

A. Reactance

B. Impedance

C. Selectivity

D. Power factor

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Correct Answer: Option C

Explanation:
Higher Q means sharper resonance, better selectivity.

This question belongs to: Science Physics

Question #3 Report Error

A bimetallic strip is used in

A. Thermostat

B. Barometer

C. Hydrometer

D. Thermometer

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Correct Answer: Option A

Explanation:
Thermostat uses differential expansion to make/break circuit.

This question belongs to: Science Physics

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