Constantan wire is used in making standard resistances because its
A
Specific resistance is low
B
Density is high
C
Temperature coefficient of resistance is negligible
D
Melting point is high
Medium
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C
Temperature coefficient of resistance is negligible
c (c) Due to the negligible temperature co-efficient of resistance of constantan wire, there is no change in it's resistance value with change in temperature.
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In steady state the potential difference across the capacitor is $10\,\, V.$ Each resistance is of $3\,\Omega $. The cell is ideal. The $emf$ of the cell is .............. $\mathrm{V}$
An ideal cell of emf $10\, V$ is connected in circuit shown in figure. Each resistance is $2\, \Omega .$ The potential difference (in $V$) across the capacitor when it is fully charged is