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Q:

If a body moves with a uniform speed in a circular motion, then______.

A) its acceleration is increasing B) its acceleration is zero
C) its velocity is changing D) its velocity is uniform
 
Answer & Explanation Answer: C) its velocity is changing

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Q:

If the velocity of a body is halved its kinetic energy ________________.

A) become 4 times B) becomes 1/4 th
C) is also doubled D) becomes half
 
Answer & Explanation Answer: B) becomes 1/4 th

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Q:

Which one among the following components is used as an amplifying device?

A) Transformer B) Diode
C) Capacitor D) Transistor
 
Answer & Explanation Answer: D) Transistor

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Q:

As per Newton's law of gravitation, the force between two bodies is ________.

A) directly proportional to the product of their masses B) directly proportional to the distance between them
C) directly proportional to the product of their radius D) directly proportional to the product of forces
 
Answer & Explanation Answer: A) directly proportional to the product of their masses

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Q:

Reflection from a smooth surface like that of a mirror is called ___________ reflection.

A) regular B) irregular
C) diffused D) fused
 
Answer & Explanation Answer: A) regular

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Q:

Which phenomena shows the particle nature of light?

A) Diffraction B) Interference
C) Photoelectric effect D) Polarisation
 
Answer & Explanation Answer: C) Photoelectric effect

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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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Q:

Kinetic energy depends on

A) the velocity or speed of the moving body. B) the mass of the moving body
C) the pressure of the moving body D) both mass and velocity of the moving body
 
Answer & Explanation Answer: D) both mass and velocity of the moving body

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