To convert a moving coil galvanometer into an ammeter, we need to connect a:
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small resistance in parallel with it
large resistance in series with it
small resistance in series with it
large resistance in parallel with it
The Correct Option is A
Solution and Explanation
Step 1: A moving coil galvanometer is a highly sensitive device used to detect small currents.
Step 2: To modify it into an ammeter, which can measure large currents, a shunt resistance (\( R_s \)) is connected in parallel: \[ R_s = \frac{G}{\left( \frac{I}{I_g} - 1 \right)} \] where \( G \) represents the galvanometer's resistance, \( I \) is the total current, and \( I_g \) is the current corresponding to full-scale deflection of the galvanometer. \bigskip
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