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15 questions · self-marked practice — reveal the answer and mark yourself.

Question 21 Mark
In a charged capacitor the energy remains in the form of ___________ between the plates of the capacitor.
Answer
electric field
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Question 31 Mark
If an uncharged metal rod is kept near a charged rod, the potential of the first rod will ___________.
Answer
reduce
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Question 51 Mark
When dielectric material is kept between the plates of a capacitor, its capacitance __________.
Answer
increase
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Question 61 Mark
When the potential V of the capacitor is reduced, the capacitance C of the conductor will ___________.
Answer
increase
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Question 81 Mark
On doubling the distance between the centres of two electric dipoles, the force applied between them is proportional to ___________.
Answer
$\frac{1}{r^4}$
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Question 91 Mark
The work done on rotating the electric dipole through an angle of 90 deg from the direction of the field will be ___________.
Answer
$W = PE (1-\cos$$\left.90^{\circ}\right)= PE (1-0)= PE$
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Question 101 Mark
The path of motion of a charged particle in a uniform electric field is ____________.
Answer
a straight line
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Question 111 Mark
The work done in bringing a charge from one point to another on the equipotential surface is ___________.
Answer
zero
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Question 141 Mark
If the work done in an electric field does not depend on the path, then it is called __________ electric field.
Answer
conservative
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