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Q:

Find the acceleration (in m/s2) produced in a body of mass 4 kg when a force of 24 N is applied on it.

A) 96 B) 6
C) 12 D) 48
 
Answer & Explanation Answer: B) 6

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Q:

Two identical resistors of 20 ohm each are connected in parallel. This combination, in turn, is connected to a 10 ohm resister. The equivalent resistance of the combination will be

A) 30 ohm B) 10 ohm
C) 5 ohm D) 20 ohm
 
Answer & Explanation Answer: A) 30 ohm

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Q:

Which of the following Newton's laws of motion can explain why a ball thrown at a wall rebounds?

A) 1st law of motion B) 2nd law of motion
C) 3rd law of motion D) Neither of the laws
 
Answer & Explanation Answer: C) 3rd law of motion

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Q:

What does the symbol R in electricity stand for ?

A) Resistance B) Resonance
C) Refraction D) Rarefaction
 
Answer & Explanation Answer: A) Resistance

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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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Q:

During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.

 

A) kinetic energy B) work done
C) heat energy D) gravitational force
 
Answer & Explanation Answer: A) kinetic energy

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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:

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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