A hydraulic press has area ratio 10:1. A force of 20 N on small piston can lift load of MCQ with Answer and Explanation

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A hydraulic press has area ratio 10:1. A force of 20 N on small piston can lift load of

A. 2000 N

B. 200 N

C. 20 N

D. 2 N

Answer: Option B

Solution (By JKSSB Mock Tests)

Pascal's law: F₁/A₁ = F₂/A₂ => F₂ = (A₂/A₁) F₁ = 10×20 = 200 N.

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

A. 200 J

B. 50 J

C. 100 J

D. 0 J

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Correct Answer: Option D

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

This question belongs to: Science Physics

Question #2

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The SI unit of electric current is

A. Volt

B. Coulomb

C. Ohm

D. Ampere

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Correct Answer: Option D

Explanation:
Ampere (A) is base unit, defined via force between conductors. 1 A = 1 C/s. Coulomb is charge. Volt potential. Ohm resistance.

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Question #3

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The term 'latent heat' was introduced by

A. Joule

B. Kelvin

C. Calorie

D. Black

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Correct Answer: Option D

Explanation:
Joseph Black introduced concept of latent heat and specific heat.

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