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JIPMER2018PhysicsCurrent Electricity

Find V_P-V_Q in the circuit shown in figure.

Options

  1. A6.68 V
  2. B8 V
  3. C4.65 V
  4. D7 V

Correct answer

C. 4.65 V

Step-by-step solution

In the given circuit, net resistance between P and Q points is R _ PQ and net resistance between Q and R points is R _ QR , then R _ PQ = 10 8 10+8 = 80 18 = 40 9 R _ QR = 10 18 25 10 18+18 25+25 10 = 4500 880 = 225 44 So, circuit will be In the series circuit, voltages will be divide in the ratio of their resistances. aligned & R _ PQ R _ QR = V _ PQ V _ QR & ( 40 9 ) ( 225 44 ) = V _ PQ V _ QR or 1760 2025 = V _ PQ V _ QR & or 1760 3785 = V_ P Q 10 V_ P Q =4.65 ~V & aligned

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