5
Q:

A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan 

A) increases B) decreases
C) remains the same D) first increases and then decreases

Answer:   C) remains the same



Explanation:

Before transferring the fish, the position is the man with the fish and the bucket of water. After transferring the position is: the man without the fish, but the fish inside the water in the bucket. Thus to know  whether there is any change in weight, it is enough to consider whether there is any change in weight when the fish in air is transferred into the water. The answer is there is no change as when in water though it loses weight due to upthrust of water on it, the level of water increases and exerts an equal force at the bottom.So, (c) is correct.

Subject: Physics
Q:

0 deg K is equivalent to

A) 273 deg C B) -273 deg C
C) 0 deg C D) 100 deg C
 
Answer & Explanation Answer: B) -273 deg C

Explanation:
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0 69
Q:

The component used for tuning a radio is basically a variable ___.

A) Resistor B) Condenser
C) Inductor D) Transformer
 
Answer & Explanation Answer: B) Condenser

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0 53
Q:

The Beaufort scale is used to measure

A) Atmospheric pressure B) Altitudes of mountains
C) Wind velocity D) Intensity of earthquakes
 
Answer & Explanation Answer: C) Wind velocity

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0 54
Q:

What is the name of the phenomena (driven by the scattering of light) in which mountain tops acquire a rosy or orange hue around sunrise and sunset?

 

A) Brillouin scattering   B) Circle of confusion  
C) Alpenglow   D) Barrel distortion  
 
Answer & Explanation Answer: C) Alpenglow  

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1 200
Q:

What is the name of the phenomena in physics and astronomy which involves the splitting of a spectral line into two or morecomponents of slightly different frequency when the light source is placed in a magnetic field?

 

A) Lumen Effect   B) Alpenglow Effect  
C) Zeeman Effect   D) Raman Effect  
 
Answer & Explanation Answer: C) Zeeman Effect  

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2 149
Q:

The product of mass and velocity is called:

 

A) Potential energy B) Momentum
C) Force D) Kinetic energy
 
Answer & Explanation Answer: B) Momentum

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1 1229
Q:

Complete the following.
1 kwh = ..........?

 

A) 36 × 10-6 J B) 3.6 × 10-6 J
C) 3.6 × 106 J D) 36 × 106 J
 
Answer & Explanation Answer: C) 3.6 × 106 J

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0 1194
Q:

A body is falling from a height of 200 m. After it has fallen 100 m, the body will possess:

 

A) less kinetic energy and more potential energy. B) Zero potential energy and half Kinetic energy
C) more kinetic energy and less potential energy. D) half potential energy and half kinetic energy.
 
Answer & Explanation Answer: D) half potential energy and half kinetic energy.

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1 179