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Q:

The pressure inside the cabin of the aircraft flying at an altitude is

A) The same as that outside B) Less than that outside
C) More than that outside D) Normal atmospheric pressure at sea level
 
Answer & Explanation Answer: C) More than that outside

Explanation:
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Q:

The quantum theory of light was given by

A) Einstein B) Newton
C) Plank D) Faraday
 
Answer & Explanation Answer: C) Plank

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Q:

Which object converts electricity to light?

A) Solar panels B) Battery
C) Bulb D) All the above
 
Answer & Explanation Answer: C) Bulb

Explanation:

Bulb converts electricity to light whereas solar panel is the device which converts light to electricity.

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Q:

The SI unit of momentum is _____________.

A) kilogram-metre per second B) kilogram-metre per second
C) kilogram-metre-second D) kilogram-metre-second squared
 
Answer & Explanation Answer: A) kilogram-metre per second

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Q:

Sunspots appear dark because they are

A) hotter than the rest of the Sun's surface. B) more magnetic than the rest of the Sun's surface. 
C) cooler than the rest of the Sun's surface. D) None of the above
 
Answer & Explanation Answer: C) cooler than the rest of the Sun's surface.

Explanation:

Sunspots are a magnetic phenomenon on the Sun.

The reason a sunspot appears dark is that they are cooler than the rest of the Sun's surface and also the gas inside the spot where the magnetic field is strongest is only emitting about 1/4 as much light as from the rest of the solar surface. 

 

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Q:

Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___.

A) 30 ohm B) 5 ohm
C) 15 ohm D) 10 ohm
 
Answer & Explanation Answer: C) 15 ohm

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Q:

For what is Mohs scale used?

A) To measure brightness of a substance B) To measure viscosity of a liquid
C) To measure elasticity of a material D) To measure hardness of minerals
 
Answer & Explanation Answer: D) To measure hardness of minerals

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Q:

A ball is dropped from a height of 10 m. It strikes the ground and rebounds up to a height of 2. m. During the collision, the per cent loss in the kinetic energy is

A) 100% B) 25%
C) 50% D) 75%
 
Answer & Explanation Answer: D) 75%

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