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Q:

During uniform motion of an object along a straight line, its ___________ remains constant with time

A) acceleration B) deceleration
C) force D) velocity
 
Answer & Explanation Answer: D) velocity

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Q:

Ozone protects biosphere from ___________

A) X ­- rays B) Gamma rays
C) Ultraviolet rays D) Infrared rays
 
Answer & Explanation Answer: C) Ultraviolet rays

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Q:

What is the viscosity of an ideal fluid?

A) Equal to its mass B) Equal to its weight
C) Zero D) One
 
Answer & Explanation Answer: C) Zero

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Q:

The atomic bomb is based on the principle of

A) Uncontrolled nuclear fusion B) Uncontrolled nuclear fission
C) Controlled nuclear fission D) Controlled nuclear fusion
 
Answer & Explanation Answer: B) Uncontrolled nuclear fission

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Q:

Meter in a vehicle that calculates distance covered by the vehicle is called __________.

A) Speedometer B) Odometer
C) Thermometer D) Kilometre
 
Answer & Explanation Answer: B) Odometer

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Q:

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.

A) greater than the weight when the person is stationary B) twice the weight when the person is stationary
C) less than the weight when the person is stationary D) same as the weight when the person is stationary
 
Answer & Explanation Answer: C) less than the weight when the person is stationary

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Q:

Find the position of the image formed by a concave mirror when the object is placed between P and F?

A) At infinity B) Between F and C
C) Behind the mirror D) Beyond C
 
Answer & Explanation Answer: C) Behind the mirror

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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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