A moving coil instrument whose resistance is 25 Ω gives a full scale deflection with a current of 1 mA. This instrument is to be used with a manganin shunt to extend its range to 100 mA. Calculate the error caused by a 10°C rise in temperature when : (1) Copper moving coil is connected directly across the manganin shunt.
A moving coil instrument whose resistance is 25 Ω gives a full scale deflection with a current of 1 mA. This instrument is to be used with a manganin shunt to extend its range to 100 mA. Calculate the error caused by a 10°C rise in temperature when : (1) Copper moving coil is connected directly across the manganin shunt.
Chapter3: Magnetic Starters
Section: Chapter Questions
Problem 30SQ
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A moving coil instrument whose resistance is 25 Ω gives a full scale deflection with a current of 1 mA. This instrument is to be used with a manganin shunt to extend its range to 100 mA. Calculate the error caused by a 10°C rise in temperature when :
(1) Copper moving coil is connected directly across the manganin shunt.
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