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Q:

Energy possessed by an object by its position or configuration is called

A) Kinetic energy B) Nuclear energy
C) Potential energy D) Electrical energy
 
Answer & Explanation Answer: C) Potential energy

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Q:

One step in the production of hydroelectric power involves _____.

A) falling water that turns a turbine  B) electric current flowing across a dam
C) hot water from under the ground D) tides that pour through a barrier dam
 
Answer & Explanation Answer: A) falling water that turns a turbine 

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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:

The work done in one complete revolution of the moon around the earth is equal to

A) centripetal force x radius of the orbit of the moon B) gravitational force x circumference of the orbit of the moon
C) gravitational force x diameter of the orbit of the moon D) zero
 
Answer & Explanation Answer: D) zero

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Q:

Find the resistance (in mega Ω) of a wire of length 10 m, cross sectional area 1 cm2 and made of a material of resistivity 100 Ωm.

 

A) 1000   B) 20  
C)  500   D) 10
 
Answer & Explanation Answer: D) 10

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Q:

What does the kinetic energy (KE) of a moving body depend upon?

A) Mass & its position B) Weight & its position
C) Mass & acceleration D) Mass & velocity
 
Answer & Explanation Answer: D) Mass & velocity

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Q:

The centre of the reflecting surface of a spherical mirror is called the

A) radius B) centre of curvature
C) pole D) focus
 
Answer & Explanation Answer: C) pole

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Q:

What of the given below devices converts chemical energy to electrical energy?

A) Transformer B) Battery
C) Electric Generator D) Wheel
 
Answer & Explanation Answer: B) Battery

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