The working principle of a hydrogen bomb is MCQ with Answer and Explanation

Question Report Error

The working principle of a hydrogen bomb is

A. Radioactive decay

B. Nuclear fusion

C. Nuclear fission

D. Chemical reaction

Answer: Option B

Solution (By JKExamLibrary)

Hydrogen bomb (thermonuclear weapon) uses uncontrolled nuclear fusion of hydrogen isotopes, triggered by a fission bomb. Releases enormous energy. Sun also uses fusion. Fission used in atomic bomb.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The unit of pressure in SI is

A. Atmosphere

B. Bar

C. Torr

D. Pascal

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Correct Answer: Option D

Explanation:
Pascal = N/m². Named after Blaise Pascal. Bar = 10⁵ Pa, atmosphere = 101325 Pa, torr = 133.3 Pa. SI unit is Pascal.

This question belongs to: Science Physics

Question #2 Report Error

Which of the following is an example of a longitudinal wave?

A. Light waves

B. Water waves on the surface

C. Radio waves

D. Sound waves in air

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Correct Answer: Option D

Explanation:
In a longitudinal wave, the particles of the medium vibrate back and forth parallel to the direction of wave propagation (creating compressions and rarefactions). Sound waves traveling through air are mechanical longitudinal waves. Light and radio waves are transverse electromagnetic waves, while surface water waves are a combination of both.

This question belongs to: Science Physics

Question #3 Report Error

Specific heat capacity of water is 1 cal/g°C. Heat required to raise temperature of 200 g water from 25°C to 35°C is

A. 2000 cal

B. 5000 cal

C. 1000 cal

D. 200 cal

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Correct Answer: Option A

Explanation:
Q = m c ΔT = 200 × 1 × 10 = 2000 cal.

This question belongs to: Science Physics

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