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Question
Which of the following charging methods work without ever touching the object to be charged to the object used to charge it?
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Solution
The correct option is B charging by induction
When a charge Q is brought near (but not touching) an uncharged conductor, the charge Q induces a charge of opposite polarity on the facing surface of the conductor and the same polarity on the rearer surface. This process of inducing a charge on the conductor without touching is known as charging induction.Whereas charging by friction and contact work only when the surface of the two object are in contact with each other.
When a charge Q is brought near (but not touching) an uncharged conductor, the charge Q induces a charge of opposite polarity on the facing surface of the conductor and the same polarity on the rearer surface. This process of inducing a charge on the conductor without touching is known as charging induction.
Whereas charging by friction and contact work only when the surface of the two object are in contact with each other.
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