A resistance of 2 is connected across one gap of a meter-bridge(the length of the wire is 100cm) and an unknown resistance, greater than 2 is connected across the other gap. When these resistances are interchanged, the unknown resistance is |
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a) |
3 |
b) |
2 |
c) |
4 |
d) |
6 |

A resistance of 2 is connected across one gap of a meter-bridge(the length of the wire is 100cm) and an unknown resistance, greater than 2 is connected across the other gap. When these resistances are interchanged, the unknown resistance is |
|||||||

a) |
3 |
b) |
2 |
c) |
4 |
d) |
6 |

1 Answer

127 votes

**(a)**

Applying,

We have

Solving Eqs. (i) and (ii), we get

127 votes

127