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Q:

Device used for the detection and measurement of all types of radiation (alpha, beta and gamma)

A) Geiger counter B) Polarimeter
C) Calorimeter D) Radiometer
 
Answer & Explanation Answer: A) Geiger counter

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Q:

One Gigabyte = ? (in decimal value)

A) 1000 bytes B) 10002 bytes
C) 10003 bytes D) 10004 bytes
 
Answer & Explanation Answer: C) 10003 bytes

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Q:

HEPA filters are used to remove microbes from

A) human tissues B) air
C) medical instruments D) liquids
 
Answer & Explanation Answer: B) air

Explanation:

High-efficiency particulate air (HEPA), also known as high-efficiency particulate absorbing and high-efficiency particulate arrestance, is an efficiency standard of air filter.

hepa-filters1596516018.png image

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Q:

Which of the following is false with reference to a photo-voltaic cell?

A) It is another name as solar cell B) It can be used as infra-red detectors
C) It can store light energy in the form of electrical energy D) It converts electric energy into light energy
 
Answer & Explanation Answer: D) It converts electric energy into light energy

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Q:

If a body takes 't' seconds to go once round the circular path of radius 'r', the velocity 'v' is given by

A) v=t2πr B) v=2πrt
C) v=2πr2t D) v=πr2t
 
Answer & Explanation Answer: B) v=2πrt

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Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 

A)  25 B)  37.5
C)  50 D)  75
 
Answer & Explanation Answer: D)  75

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Q:

Fuse wire is made of an alloy of

A) Tin and Lead B) Tin and Copper
C) Lead and Copper D) Copper and Silver
 
Answer & Explanation Answer: A) Tin and Lead

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Q:

In which of the following situations is mechanical energy most likely to be conserved?

A) A feather falls from the sky. B) A football flies through the air.
C) A hockey player digs his skates into the ice. D) A skateboard rolls into the grass.
 
Answer & Explanation Answer: B) A football flies through the air.

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