A) a high resistance in parallel with its coil
B) a high resistance in series with its coil
C) a low resistance in parallel with its coil
D) a low resistance in series with its coil
Correct Answer: B
Solution :
[b] Key Idea: To work as voltmeter, the resistance of galvanometer should be high. A voltmeter indeed is a modified form of a pivoted coil galvanometer. Since, the resistance of coil of galvanometer of its own is low, hence to convert a galvanometer into a voltmeter, its resistance is to be increased. For this an appropriate high resistance is joined in series with the galvanometer as shown in figure |
The value of this resistance to be connected depends on the range of the voltmeter. |
Note: A voltmeter is always connected in parallel in an electric circuit. |
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