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Class 12 › Physics › Current Electricity
CBSE2018Class Class 12 · Physics1 Marks · Short✅ Verified
Define the current sensitivity of a galvanometer. Write its SI unit.
✅ Answer & Solution
Current sensitivity = deflection produced per unit current:
$$S_I = \frac{\theta}{I} = \frac{nBA}{k}$$
where $n$ = number of turns, $B$ = magnetic field, $A$ = area of coil, $k$ = restoring torque constant.
SI unit: rad/A or div/A.
