The porpoise of providing a swamping resistance in a dynamometer type moving coil instruments is
A. to provide equal time constant for fixed coil and moving coil, when used for AC measurements
B. to reduce the bulk of the moving coil system
C. to reduce the current flowing through the moving coil
D. to control the deflecting torque
Answer:A
The porpoise of providing a swamping resistance in a dynamometer type moving coil instruments is
A. to provide equal time constant for fixed coil and moving coil, when used for AC measurements B. to reduce the bulk of the moving coil system C. to reduce the current flowing through the moving coil D. to control the deflecting torque