Physics Questions

Q:

The laws which govern the motion of planets are called ___________________.

A) Newton's Laws B) Kepler's Laws
C) Avogadro's laws D) De Morgan's Laws
 
Answer & Explanation Answer: B) Kepler's Laws

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Q:

A broadcasting station transmits waves with a frequency of 71 x 104 Hz and a speed of 3 x 108 m/s. The wavelength of the wave is

A) 324.6 m B) 422.5 m
C) 208.4 m D) 418.8 m
 
Answer & Explanation Answer: B) 422.5 m

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Q:

The value of universal gravitation constant (G) was determined by

A) Henry Cavendish B) Antoine L Lavoisier
C) Isaac Newton D) John Dalton
 
Answer & Explanation Answer: A) Henry Cavendish

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Q:

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

A) 2000 B) 500
C) 1000 D) 100
 
Answer & Explanation Answer: C) 1000

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Q:

If a ball is thrown up, which of the following does not change?

A) Acceleration B) Speed
C) Potential energy D) Distance
 
Answer & Explanation Answer: A) Acceleration

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Q:

Which of the following pairing is incorrect

A) Hygrometer ­- Water vapour content of the atmosphere B) Lactometer - ­ Specific gravity of liquids
C) Anemometer ­ - Speed of the wind D) Seismograph -­ Earthquakes
 
Answer & Explanation Answer: B) Lactometer - ­ Specific gravity of liquids

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Q:

What is the unit of resistance?

A) ohm B) farad
C) henry D) weber
 
Answer & Explanation Answer: A) ohm

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Q:

Newton's first law is also known as _______.

A) Law of friction B) Law of moments
C) Law of Inertia D) Law of motion
 
Answer & Explanation Answer: C) Law of Inertia

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