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Q:

If the momentum of a body is tripled, its KE will

A) become three times its original value B) remain the same
C) become six times its original value D) become nine times its original value
 
Answer & Explanation Answer: D) become nine times its original value

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Q:

A lens has a power +2.0 D. The type of lens and its focal length will be

A) Concave, -0.5 m B) Convex, 0.5 m
C) Concave, 0.5 m D) Convex, -0.5 m
 
Answer & Explanation Answer: B) Convex, 0.5 m

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Q:

The Brownian Motion was discovered by

A) Robert Brown B) Mandel Brown
C) Isaac Newton D) John Brown
 
Answer & Explanation Answer: A) Robert Brown

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Q:

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

A) F/25 B) 5F
C) F/5 D) 25F
 
Answer & Explanation Answer: D) 25F

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Q:

Light can travel ___ km in a year.

A) 5 billion B) 10 billion
C) 5 trillion D) 10 trillion
 
Answer & Explanation Answer: D) 10 trillion

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Q:

What happens to the Potential and Kinetic energies of a body as it falls down from a height?

A) Its Potential energy decreases while its Kinetic energy increases B) There is no change in its Potential or Kinetic energy
C) Its Potential and Kinetic energies decrease D) Its Potential energy increases while its Kinetic energy decreases
 
Answer & Explanation Answer: A) Its Potential energy decreases while its Kinetic energy increases

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Q:

The diameter of the reflecting surface of a spherical mirror is called a/an

A) principal axis B) aperture
C) focus D) pole
 
Answer & Explanation Answer: B) aperture

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Q:

What is the range of frequencies of sound waves audible to human beings?

A) 16kHz to 200kHz B) 16Hz to 16kHz
C) 16Hz to 20kHz D) 14Hz to 20kHz
 
Answer & Explanation Answer: C) 16Hz to 20kHz

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