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The resistors R1, R2, R3 and R4 in the figure given below are all equal in value. What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance ? |
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Answer» Req = R + R + R + R = 4R ohm Total current in the circuit, I = V/R = 12/4R = 3/R Reading of voltmeter A = Voltage across R1 = I x R1 = 3/R x R = 3V Reading of voltmeter B = Voltage across R2 = I x R2 = 3/R x R = 3V Reading of voltmeter C = Voltage across the series combination of R3 and R4 = Ix(R3 + R4) = 3/R x 2R = 6V |
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