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Q:

AC is converted into DC by a

A) Condenser B) Rectifier
C) Amplifier D) Filter
 
Answer & Explanation Answer: B) Rectifier

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Q:

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

A) 400 J B) 50 J
C) 40 J D) 100 J
 
Answer & Explanation Answer: A) 400 J

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Q:

Which of the following instrument is used to measure Soil Water Tension?

A) Photometer B) Pyrometer
C) Psychrometer D) Tensiometer
 
Answer & Explanation Answer: D) Tensiometer

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Q:

For what is Mohs scale used?

A) To measure brightness of a substance B) To measure viscosity of a liquid
C) To measure elasticity of a material D) To measure hardness of minerals
 
Answer & Explanation Answer: D) To measure hardness of minerals

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Q:

The kinetic energy of a ball weighing 0.5 kg moving with a velocity of 4 m/s will be

A) 16 J B) 4 J
C) 8 J D) 12 J
 
Answer & Explanation Answer: B) 4 J

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Q:

Sensitivity of potentiometer can be increased by

A) increasing the length of the potentiometer wire B) increasing the e.m.f of the cell
C) decreasing the length of the potentiometer wire D) none of these
 
Answer & Explanation Answer: A) increasing the length of the potentiometer wire

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Q:

Sensitivity of potentiometer can be increased by

A) increasing the e.m.f. of the cell B) increasing the length of the potentiometer
C) decreasing the length of the potentiometer wire D) none of these
 
Answer & Explanation Answer: B) increasing the length of the potentiometer

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Q:

If the initial velocity of a car is 5 m/s, and the final velocity is 10 m/s in 5s, then the acceleration is ___.

A) 10 m/s2 B) 0.1 m/s2
C) 1 m/s2 D) 5 m/s2
 
Answer & Explanation Answer: C) 1 m/s2

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