Physics - Questions and Answers, General Study (GK)

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111.

A block of ice is floating in a glass containing water. When the ice melts completely, the level of the water in the glass will

(a)rise

(b)fall

(c)not change

(d)None of these

Comment

Answer is: CNA

112.

it is easier to swim in a sea water than in ordinary water because

(a)sea water contains salt

(b)atmosphere pressure is highest at the sea level

(c)density of sea water is less than that of ordinary water

(d)density of sea water is higher than that of ordinary water

Comment

Answer is: DNA

113.

For a body float in a liquid with some portion outside, the weight of the liquid displaced by the fully immersed body

(a)should be more than the weight of the body

(b)should be equal to the weight of the body

(c)should be less than the weight of the body

(d)none of these

Comment

Answer is: ANA

114.

An inflated balloon is floating on the surface of water. It is pushed so as to submerge completely and then released. It will

(a)sink to the bottom

(b)come back to its earlier position

(c)remain submerged at the same place

(d)first sink to the bottom and then come up

Comment

Answer is: BNA

115.

A body is just floating in a liquid if the body is slightly pressed down and released. It will

(a)start oscillating

(b)sink to the bottom

(c)come back to the same position immediately

(d)come back to the same position stable

Comment

Answer is: BNA

116.

In order that a floating object be in stable equilibrium, its centre of buoyancy

(a)should be vertically below its centre of gravity

(b)should be horizontal in line with its center of gravity

(c)should be vertically above its centre of gravity

(d)may be anywhere

Comment

Answer is: CNA

117.

Lactometer is a form of hydrometer used to measure the purity of milk. If in milk, the lactometer sinks up to the mark of 1, which one of the following conclusions can be drawn?

(a)The milk in the liquid is only 50% pure

(b)The milk in the liquid is only 3/4th of it

(c)The milk in the liquid is only 1/4th (25% pure) of it

(d)The milk is 100% pure

Comment

Answer is: CNA

118.

Consider the following statements
1. The density of water is maximum at 5°C.
2. The hydrometer is a device through which the density of fluids is measured.
Which of the above statement(s) given above is/are correct?

(a)only 1

(b)only 2

(c)Both 1 and 2

(d)Neither 1 nor 2

Comment

Answer is: BNA

119.

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: CNA

120.

Surface tension depends on

(a)atmosphere pressure

(b)nature of the liquid

(c)temperature of the liquid

(d)All of the above

Comment

Answer is: DNA

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Physics - Questions and AnswersPage 12

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