Question

you
17. in the given circuit if a potential difference
120 V is applied across the points A and B then
polential difference between the points P and
will be
B
(1) 20 V
(3) 40 V
20
(2) 30 v
(43)60 v​

Answer 1

The potential difference between the points A and B will be 60 V

Explanation:

V(AB) = V2 = ?

C(net) = ?

1/C(net) = 1/2C + 1/C + 1/2C

Q = CV = C/2V = CV/2

Q2 = Q = CV/2

V2 = 6V

Thus the potential difference between the points A and B will be 60 V

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The potential difference between the terminals of an electric heater is 60V when it draws current of 4A from the source.What current will the heater draw if the potential difference is increased to 120V?

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