Physics - Questions and Answers, General Study (GK)

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431.

If a hole is bored along a diameter of the earth and a stone is dropped into the hole. it will

(a)Reach the centre of earth and stop here

(b)Execute SHM about the centre of the earth

(c)Reach the other side of the earth and stop there

(d)Execute oscillatory but not SHM about the centre of earth

Comment

Answer is: B

432.

An inflated balloon Rises to a definite height once it starts going up. this balloon cannot write any further because at that height

(a)Atmosphere pressure reduce to zero

(b)Apparent weight of the balloon reduced to zero

(c)Density of the balloon reduced to zero

(d)Acceleration due to gravity reduce to zero

Comment

Answer is: B

433.

Consider the following statements
1. The liquid pressure is inversely proportional to the density of liquid.
2. The pressure exerted on the liquid does not depend upon the shape or size of the container.
Which of statement given above is correct

(a)Only 1

(b)Only 2

(c)Both 1 and 2

(d)Neither 1 nor 2

Comment

Answer is: B

434.

Two pieces of different metals, when completely immersed in water, experience equal upthrust, then

(a)Both pieces have same density

(b)Both pieces have equal volume

(c)Both pieces have equal weight in air

(d)None of the above

Comment

Answer is: B

435.

A steel ball is floating in a beaker containing Mercury. If some water is poured in the breaker, the street ball will

(a)Move up

(b)Move down

(c)Continue its position

(d)Execute vertical oscillation

Comment

Answer is: A

436.

Consider the following statements
The fraction of a ball floating inside the liquid depends upon
1. Density of the liquid
2. Mass of the ball
3. Density of the ball
Which of the statements given above are correct

(a)1 and 2

(b)2 and 3

(d)1, 2 and 3

Comment

Answer is: C

437.

The angle of contact of a liquid with a solid does not depends on

(a)The nature of the liquid and the solid

(b)The medium which exists above the free surface of the liquid

(c)The angle of inclination of the solid to the solid liquid surface

(d)None of the above

Comment

Answer is: C

438.

The surface tension phenomenon is the result of the tendency of a system to

(a)Conserve volume

(b)Keep surface area minimum

(c)Keep potential energy minimum

(d)Conserve energy

Comment

Answer is: B

439.

Meniscus of mercury in a capillary is

(a)Plane

(b)Cylindrical

(c)Concave

(d)Convex

Comment

Answer is: D

440.

Consider the following statements
1. Surface tension of liquid depends on length but not on the area, like the elastic property.
2. SI unit of surface tension is N/m.
3. Surface tension is a scalar quantity because it has no specific direction for a given liquid.
Which of the statements given above are correct?

(a)1 and 2

(b)2 and 3

(c)Only 3

(d)1, 2 and 3

Comment

Answer is: D

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Physics - Questions and AnswersPage 44

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