The resistance of an ammeter is 3 and its scale is graduated for a current upto 100A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750A by this meter. The value of shunt resistance is |
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a) |
b) |
2 |
c) |
0.2 |
d) |
2K |

The resistance of an ammeter is 3 and its scale is graduated for a current upto 100A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750A by this meter. The value of shunt resistance is |
|||||||

a) |
b) |
2 |
c) |
0.2 |
d) |
2K |

1 Answer

127 votes

**(b)**

Let be the current flowing through ammeter and i the total current. So, a current

will flow through shunt resistance.

Potential difference across ammeter and shunt resistance is same,

Given,

Hence,

127 votes

127