A 2 kg object has potential energy 196 J at a height (g=9.8) of MCQ with Answer and Explanation

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A 2 kg object has potential energy 196 J at a height (g=9.8) of

A. 20 m

B. 196 m

C. 10 m

D. 98 m

Answer: Option C

Solution (By JKSSB Mock Tests)

h = PE/(mg) = 196/(2×9.8) = 196/19.6 = 10 m.

This question belongs to: Science Physics

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Question #1

The phenomenon of bending of light around corners is called

A. Reflection

B. Dispersion

C. Diffraction

D. Refraction

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Correct Answer: Option C

Explanation:
Diffraction is bending around obstacles/apertures.

This question belongs to: Science Physics

Question #2

The distance between two consecutive compressions in a longitudinal wave is called

A. Frequency

B. Amplitude

C. Wavelength

D. Time period

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Correct Answer: Option C

Explanation:
Wavelength.

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Question #3

An electric heater of resistance 10 Ω draws current 5 A. Power consumed is

A. 2 W

B. 250 W

C. 500 W

D. 50 W

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Correct Answer: Option B

Explanation:
P = I²R = 5² × 10 = 25 × 10 = 250 W. Also P = VI, but V not given. Can find V = IR = 50 V, then P = 50×5 = 250 W.

This question belongs to: Science Physics

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