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A parallel plate capcitor of capacitance...

A parallel plate capcitor of capacitance C is charged to a potential V by a battery. Without disconencting the battery = distance between the plates of capacitor is triple and a dielectric medium of K = 10 is introduced between the plates of capacitor. Explain giving reasons how will the following be affected ?
(a) Capacitance of capacitor
(b) Charge on capacitor
(c ) Energy density of capacitor.

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