The energy source of the Sun is MCQ with Answer and Explanation

Question Report Error

The energy source of the Sun is

A. Nuclear fission

B. Chemical reaction

C. Nuclear fusion

D. Gravitational collapse

Answer: Option C

Solution (By JKExamLibrary)

Hydrogen fusion to helium releases energy.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

If X = a²b³/c², and percentage errors in a, b, c are 2% each, the maximum percentage error in X is

A. 12%

B. 8%

C. 14%

D. 10%

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Correct Answer: Option C

Explanation:
ΔX/X = 2(Δa/a) + 3(Δb/b) + 2(Δc/c) = 2×2% + 3×2% + 2×2% = 4% + 6% + 4% = 14%. Always add absolute relative errors.

This question belongs to: Science Physics

Question #2 Report Error

The amount of heat required to raise temperature of 1 g water by 1°C is

A. Both B and C

B. 4.2 J

C. 1 cal

D. 1 J

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Correct Answer: Option A

Explanation:
1 cal = 4.186 J ≈ 4.2 J. So both are correct. However option D covers both. I'll set D as correct.

This question belongs to: Science Physics

Question #3 Report Error

The device that protects electrical circuits from overload is

A. Resistor

B. Capacitor

C. Switch

D. Fuse

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Correct Answer: Option D

Explanation:
Fuse melts and breaks circuit when current exceeds rating. MCB (Miniature Circuit Breaker) does same but resettable. Switch only turns on/off. Resistor limits current but doesn't break.

This question belongs to: Science Physics

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