Question:
If the number of turns in the coil of a galvanometer are decreased, then the resistance of galvanometer
If the number of turns in the coil of a galvanometer are decreased, then the resistance of galvanometer
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Resistance of a coil directly depends on the total length of wire used.
Updated On: Jan 26, 2026
- may increase or decrease
- increases
- remains the same
- decreases
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The Correct Option is D
Solution and Explanation
Step 1: Resistance of a coil.
Resistance of a wire is \[ R = \rho \frac{l}{A} \]
Step 2: Relation with number of turns.
Total length of wire \( l \) is proportional to number of turns.
Step 3: Effect of decreasing turns.
When number of turns decreases, the length of wire decreases.
Step 4: Conclusion.
Hence, resistance of galvanometer decreases.
Resistance of a wire is \[ R = \rho \frac{l}{A} \]
Step 2: Relation with number of turns.
Total length of wire \( l \) is proportional to number of turns.
Step 3: Effect of decreasing turns.
When number of turns decreases, the length of wire decreases.
Step 4: Conclusion.
Hence, resistance of galvanometer decreases.
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