Moving Charges and Magnetism · Current loop and galvanometer
A voltmeter with internal resistance of can be used to measure upto 20 V. In order to increase its measuring range to 30 V, the required modification is to .
- (1)connect resistor of , in series with voltmeter.
- (2)connect resistor of , in parallel to voltmeter.
- (3)connect resistor of , in series with voltmeter.
- (4)connect resistor of , in parallel to voltmeter.
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