Physics Questions

Q:

The instrument that measures the ______________ is called an anemometer.

A) wind speed B) pressure
C) humidity D) rainfall
 
Answer & Explanation Answer: A) wind speed

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Q:

Which type of electromagnetic radiation has the longest wavelength?

A) UV rays B) Radio waves
C) X rays D) Infrared waves
 
Answer & Explanation Answer: B) Radio waves

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Q:

Find the potential energy gained by a body of mass 50 kg, if it is raised by 10m. (use g = 10 m/s2)

A) 50 B) 5000
C) 2500 D) 25
 
Answer & Explanation Answer: B) 5000

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Q:

What is the duration of the world’s shortest X–ray laser has been successfully created by the scientists?

 

A) 39 nanoseconds B) 43 attoseconds
C) 15 picoseconds D) 57 microseconds
 
Answer & Explanation Answer: B) 43 attoseconds

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Q:

A high jumper runs for a while before taking a high jump so that the inertia of __ helps him take the long jump.

A) rest B) shape
C) motion D) direction
 
Answer & Explanation Answer: C) motion

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Q:

What is the value of acceleration due to gravity at the centre of earth?

A) -1 B) 0
C) 1 D) Infinity
 
Answer & Explanation Answer: B) 0

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Q:

An earthquake of magnitude _________________ on Richter scale has thousand times more destructive energy than an earthquake of magnitude 4.

 

A) 5 B) 7
C) 6 D) 8
 
Answer & Explanation Answer: C) 6

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Q:

Which of the following devices converts Chemical energy into Electrical energy?

A) Electric heater B) Electric fan
C) Hair dryer D) Electric cell
 
Answer & Explanation Answer: D) Electric cell

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