How is the flux of shunt coil related to voltage?(a) flux is proportional to square of voltage(b) directly proportional(c) inversely proportional(d) independent of each otherThis question was posed to me during an interview.I want to ask this question from Errors in Single Phase Energy Meters in section Measurement of Power and Related Parameters of Electrical Measurements

How is the flux of shunt coil related to voltage?(a) flux is proportio

1.	How is the flux of shunt coil related to voltage?(a) flux is proportional to square of voltage(b) directly proportional(c) inversely proportional(d) independent of each otherThis question was posed to me during an interview.I want to ask this question from Errors in Single Phase Energy Meters in section Measurement of Power and Related Parameters of Electrical Measurements
Answer» The correct ANSWER is (a) flux is PROPORTIONAL to SQUARE of voltage The best I can EXPLAIN: In an energy meter, the supply voltage may fluctuate as a result of unavoidable reasons leading to errors in the reading. Supply voltage causes the shunt flux to induce an e.m.f in the disc. This is results in a self braking TORQUE proportional to square of the voltage.

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