A body is thrown vertically upwards with kinetic energy 100 J. At highest point, kinetic energy is MCQ with Answer and Explanation

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A body is thrown vertically upwards with kinetic energy 100 J. At highest point, kinetic energy is

A. 50 J

B. 200 J

C. 0 J

D. 100 J

Answer: Option C

Solution (By JKSSB Mock Tests)

At highest point velocity zero, so K.E. = 0. All converted to P.E.

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Question #1

A 100 W bulb operates at 200 V. Its resistance is

A. 50 Ω

B. 200 Ω

C. 100 Ω

D. 400 Ω

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Correct Answer: Option D

Explanation:
Power P = V²/R => R = V²/P = 200²/100 = 40000/100 = 400 Ω. Also current I = P/V = 0.5 A, R = V/I = 200/0.5 = 400 Ω. Use P = V²/R for direct calculation.

This question belongs to: Science Physics

Question #2

Water boils at a lower temperature at high altitudes because

A. Low atmospheric pressure

B. Low density of air

C. High humidity

D. Low temperature

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Correct Answer: Option A

Explanation:
Lower pressure reduces boiling point. Pressure cooker increases boiling point by raising pressure.

This question belongs to: Science Physics

Question #3

The electric bulb was invented by

A. Nikola Tesla

B. James Watt

C. Michael Faraday

D. Thomas Edison

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Correct Answer: Option D

Explanation:
Thomas Alva Edison invented the practical incandescent light bulb in 1879.

This question belongs to: Science Physics

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