Physics · Torque experienced by a current loop in a uniform magnetic field: Moving coil galvanometer, its sensitivity and conversion to ammeter and voltmeter
Sensitivity of a moving coil galvanometer can be increased by Fill in the blank.
Sensitivity of a moving coil galvanometer can be increased by Fill in the blank.
- A. decreasing number of turns in rectangular coil
- B. decreasing magnetic induction of magnetic field
- C. increasing area of rectangular coil
- D. increasing twist constant of phosphor bronze fiber
Step-by-step solution
Sensitivity of a moving coil galvanometer is proportional to NBA/C, where N is number of turns, B is magnetic field, A is area, and C is torsional constant. Increasing A increases the torque for a given current, thus increasing sensitivity.
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