Question

In a suspended-coil galvanometer, the phosphor-bronze strip serves to:

Options

• provide eddy current damping

• generate the radial magnetic field

• act as the pointer moving over the scale

• suspend the coil and provide the restoring torque

Answer 1

In the suspended type, the phosphor-bronze strip suspends the coil and supplies the restoring torque \(\tau_{restoring} = C\phi\) that balances the deflecting torque. Its low torsional constant \(C\) helps achieve very high sensitivity.