A moving coil galvanometer has a resistance of 10 and full scale deflection of 0.01A. It can be converted into voltmeter of 10V full scale by connecting into resistance of |
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a) |
9.90 is series |
b) |
10 in series |
c) |
990 in series |
d) |
0.10 in series |

A moving coil galvanometer has a resistance of 10 and full scale deflection of 0.01A. It can be converted into voltmeter of 10V full scale by connecting into resistance of |
|||||||

a) |
9.90 is series |
b) |
10 in series |
c) |
990 in series |
d) |
0.10 in series |

1 Answer

127 votes

**(c)**

Let G be resistance of galvanometer and the current through it. Let V is maximum potential difference, then from Ohm’s law

Given

Thus, on connecting a resistance R of 990 in series with the galvanometer, the galvanometer will become a voltmeter of range zero to 10V.

127 votes

127