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18. Electric Charges And Field question bank (Physics)

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Q1.

Two small identical metal balls are equally charged and placed at a fixed distance away from each other. They experience an electrostatic force '$F$'. $A$ similar uncharged ball,after touching one of them,is placed at the midpoint between the two balls. The force experienced by this ball is:

(A)
$F/2$
(B)
$F$
(C)
$4F$
(D)
$2F$
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Q2.

The Van de Graaff generator is not based on

(A)
the phenomenon of Corona discharge.
(B)
the application of electric field and magnetic field which are perpendicular to each other.
(C)
the property that charge given to a hollow conductor is transferred to its outer surface and distributed uniformly over it.
(D)
the fact that if a charge is continuously supplied to an isolated metallic conductor,the potential of the conductor goes on increasing.
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