PF EMI BYU 23

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Three identical coils A, B and C are wound symmetrically on a toroidal iron core in the same sense. An alternating voltage source is connected across the coil A and an ideal voltmeter is connected across the coil C. If the coil B is left open, the voltmeter reads half of the source voltage. How much will the voltmeter, if the coil B is short-circuited ?




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