| ASSERTION: The range of given voltmeter can be both increased and decreased. |
| REASON: By adjusting the value of resistance in series with galvanometer the range of voltmeter can be adjusted. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
As we know that for converting a galvanometer of resistance GB into a voltmeter of range V, a high resistance R given by\[R=\frac{V}{{{I}_{g}}}-G\], has to be connected in series to the coil of the galvanometer. In order to increase the range of the voltmeter, R has to be increased. On the other hand, to decrease the range of the voltmeter, R has to decrease.
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