Mechanical Physics MCQ question and answer with solution

A) Most likely speed increases B) The fraction of molecules increases with the maximum possible speed C) Delivery becomes widespread D) The area under the distribution curve remains the same as below the lower temperature value

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Answer: Option B

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Consider the following statements.
The rise of a liquid in a capillary tube depends on
1. The surface tension of liquid
2. The length
3. The outer radius
4. The inner radius of the tube
Which of the following statements is/are true?

A) 1, 2 and 4 B) 1 and 2 C) 1 and 4 D) 2 and 4

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Answer: Option A

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While travelling by plane, the ink of the pen starts to come out

A) Due to decrease in air pressure B) Due to increase in air pressure C) Due to increase in volume of ink D) Due to excessive load

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Answer: Option A

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Assertion (A) Pascal law is the working principle of a hydraulic lift.
Reason (R) Pressure is equal to thrust per unit area.

A) Both A and R are true and R is the correct explanation of A B) Both A and R are true, but R is not the correct explanation of A C) A is true, but R is false D) A is false, but R is true

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Answer: Option B

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When pressure is applied to a fluid, the pressure change is transmitted to every part of the fluid without any loss. Which of the following laws explains this phenomenon?

A) Hooke's Law B) Bernoulli's Law C) Avogadro's Law D) Pascal's Law

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Answer: Option D

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The SI unit of elastic potential energy is

A) watt B) joule C) joule's D) joule s^-1

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Answer: Option B

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The breaking stress of wire depends on

A) material of the wire B) length of the wire C) radius of the wire D) shape of the cross-section of the wire

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Answer: Option A

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Any body kept in a fluid experiences an upward force called . . . . . . . .

A) torque B) moment C) pressure D) upthrust

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Answer: Option D

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Assertion (A) The concept of surface tension is held only for liquid.
Reason (R) Surface tension does not hold for gases.

A) Both A and R are true and R is the correct explanation of A B) Both A and R are true, but R is not the correct explanation of A C) A is true, but R is false D) A is false, but R is true

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Answer: Option D

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The pressure of a fluid varies with depth h as p = p₀ + pgh, where p is the fluid density. This expression is associated with

A) Pascal's Law B) Newton's Law C) Bernoulli's Principle D) Archimedes' Principle

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Answer: Option A

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Mechanical Physics MCQ question and answer with solution | Physics Gk MCQs