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Q:

The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called ___

A) inertia B) momentum
C) energy D) force
 
Answer & Explanation Answer: A) inertia

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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:

The SI unit of acceleration is __________.

A) ms-1 B) ms-2
C) ms2 D) m/s
 
Answer & Explanation Answer: B) ms-2

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Q:

What is the unit of the physical quantity, Illuminance?

A) siemens B) tesla
C) lux D) weber
 
Answer & Explanation Answer: C) lux

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Q:

Resistance switching is normally employed in

A) Bulk oil breakers B) All breakers
C) Air blast circuit breakers D) Minimum oil breakers
 
Answer & Explanation Answer: C) Air blast circuit breakers

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Q:

Pressure is measured in terms of

A) Mass & Density B) Work done
C) Force and Area D) Force and Distance
 
Answer & Explanation Answer: C) Force and Area

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Q:

Why metals conduct electricity?

A) Because of low melting point B) Because of high tensile strength
C) Because of free electrons D) Because of high atomic density
 
Answer & Explanation Answer: C) Because of free electrons

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Q:

The area under a Velocity-Time graph represents ______________.

A) distance B) acceleration
C) force D) momentum
 
Answer & Explanation Answer: A) distance

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