Physics · Galvanometer
In a permanent magnet moving coil (PMMC) galvanometer, the damping force is primarily provided by:
- 1Torsional elasticity of the bronze wire
- 2Fluid friction of the needle movement
- 3Eddy currents induced in the aluminium frame✓
- 4Magnetic induction in the air gap
Correct answer
Eddy currents induced in the aluminium frame
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