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Q:

One Watt = ?

A) 1 Joule/sec B) 1 erg/sec
C) 1 Pascal/sec D) 1 m/s
 
Answer & Explanation Answer: A) 1 Joule/sec

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Q:

Which of the following has the same unit as energy?

A) Work B) Power
C) Density D) Force
 
Answer & Explanation Answer: A) Work

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Q:

Mechanical energy is equal to

A) Kinetic energy + Chemical energy B) Kinetic energy + Potential energy
C) Kinetic energy + Heat energy D) Kinetic energy + Electrical energy
 
Answer & Explanation Answer: B) Kinetic energy + Potential energy

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Q:

___ is not related to gases.

A) Boyle's Law B) Joule's Law
C) Avogadro's Law D) Charle's Law
 
Answer & Explanation Answer: B) Joule's Law

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Q:

The centre of the reflecting surface of a spherical mirror is called the

A) radius B) centre of curvature
C) pole D) focus
 
Answer & Explanation Answer: C) pole

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Q:

A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance X1, in the first 10 s and distance X2 in the remaining 10 s, then which of the following is true?

 

A) X2 = 2X1 B) X1 = 3X2
C) X2 = X1 D) X2 = 3X1
 
Answer & Explanation Answer: D) X2 = 3X1

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Q:

Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?

 

A) The cloth completely absorbs red colour wavelength B) It is due to refraction
C) It is the effect of scattering of light D) It is due to Parallax error
 
Answer & Explanation Answer: A) The cloth completely absorbs red colour wavelength

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Q:

Sound CANNOT travel through

A) Air B) Vacuum
C) Liquid D) Solid
 
Answer & Explanation Answer: B) Vacuum

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