In a sensitive meter bridge apparatus the bridge wire should possess
AIEEE 2012, Diffcult
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Bridge wire in a sensitive meter bridge wire should be of high resistivity and low temperature coefficient
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A wire of length $5\,m$ and radius $1\,mm$ has a resistance of $1\, ohm$. What length of the wire of the same material at the same temperature and of radius $2\,mm$ will also have a resistance of $1\, ohm$ .............. $m$
In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of $10\, ohm$ is connected in one gap, the value of resistance in other gap is ............. $\Omega$
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