A) high resistance in series with galvanometer
B) low resistance in series with galvanometer
C) high resistance in parallel with galvanometer
D) low resistance in parallel with galvanometer
Correct Answer: A
Solution :
Key Idea: A galvanometer has its own resistance low but a voltmeter must have high resistance. A voltmeter indeed is a modified form of a pivoted coil galvanometer. Since the resistance of coil of galvanometer of its own is low, its resistance is to be increased as is a necessary condition for a voltmeter. For this an appropriate high resistance should be connected in series with the galvanometer as shown. Note: The resistance of an ideal voltmeter should be infinite.You need to login to perform this action.
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