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Q#1 Electro-mechanical Instruments GATE EE 1998 NAT +2 marks -0 marks

A moving coil instrument, whose resistance is 5Ω and whose working current (for full-scale deflection) is 0.015A, is to be used, with a manganin shunt, to measure 100A. calculate the error caused by a 10℃ rise in temperature, if the temperature coefficient of copper and manganin are 0.004 ohm/℃, and 0.00015 ohm/℃ respectively.

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