A moving coil milli ammeter has a resistance of 5 ohm and a full scale deflection of 20mA. Determine the resistance of a shunt to be used so that the instrument could measure current up to 500 mA at 20 degrees. What is the percentage error in the instrument operating at temperature of 40 degrees? Temperature co- efficient of copper = 0.0039 per degrees Celsius above.
A moving coil milli ammeter has a resistance of 5 ohm and a full scale deflection of 20mA. Determine the resistance of a shunt to be used so that the instrument could measure current up to 500 mA at 20 degrees. What is the percentage error in the instrument operating at temperature of 40 degrees? Temperature co- efficient of copper = 0.0039 per degrees Celsius above.
Chapter32: Two-speed, One-winding (consequent Pole) Motor Controllers
Section: Chapter Questions
Problem 6SQ: Describe the operation of Figure 325 (B) by adding jumper wire A to the original circuit.
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A moving coil milli ammeter has a resistance of 5 ohm and a full scale deflection of 20mA. Determine the resistance of a shunt to be used so that the instrument could measure current up to 500 mA at 20 degrees. What is the percentage error in the instrument operating at temperature of 40 degrees? Temperature co- efficient of copper = 0.0039 per degrees Celsius above.
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