Question

Find the potential difference across the capacitor in volts.
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10V
(A) 7.
(B) 8
(C) 9
(D) 10​

Answer 1

The potential difference across the capacitors is 8V.

Explanation:

The equivalent circuit shows that:

Current "I" = 10 / 5R/3 = 6V / R

Thus potential at point "A" assumed to be = 10 V

And at VE = 0

VA = 10 = VB

Vc = 10 - 2 = 8V

Again VF = 8 - 2 = 6 V

Hence potential difference between capacitors

VC - VE = 8 - 0 = 8 V

Thus the potential difference across the capacitors is 8V.

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The potential difference between the terminals of a battery of EMF 6 volt and internal resistance 1 ohm drops 5.8 ohms when connected across an external resistor. find the resistance of the external resistor ?

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