The number of neutrons in ²³⁸₉₂U is MCQ with Answer and Explanation

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The number of neutrons in ²³⁸₉₂U is

A. 330

B. 92

C. 146

D. 238

Answer: Option C

Solution (By JKSSB Mock Tests)

Neutrons = A - Z = 238 - 92 = 146.

This question belongs to: Science Physics

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Question #1

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A current of 0.5 A flows through a 100 Ω resistor. Voltage across it is

A. 50 V

B. 5 V

C. 0.005 V

D. 200 V

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Correct Answer: Option A

Explanation:
V = IR = 0.5×100 = 50 V.

This question belongs to: Science Physics

Question #2

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The weight of a body on moon is 1/6 of its weight on Earth. If a person weighs 60 kg on Earth, mass on moon is

A. 60 kg

B. 360 kg

C. 6 kg

D. 10 kg

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Correct Answer: Option A

Explanation:
Mass is constant, weight changes. 60 kg mass, weight 588 N on Earth, 98 N on moon.

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Question #3

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The heat required to convert 1 g of water at 100°C to steam at 100°C is (latent heat 540 cal/g)

A. 80 cal

B. 1000 cal

C. 540 cal

D. 100 cal

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Correct Answer: Option C

Explanation:
Latent heat of vaporisation, 540 cal/g.

This question belongs to: Science Physics

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