The value of internal resistance of an ideal cell is $\Omega$
A$0$
B$0.5$
C$1$
D
Infinity
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A$0$
a (a)An ideal cell has zero resistance.
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A uniform heating wire of resistance $36\, \Omega$ is connected across a potential difference of $240\, {V}$ The wire is then cut into half and potential difference of $240\, {V}$ is applied across each half separately. The ratio of power dissipation in first case to the total power dissipation in the second case would be $1: {x}$, where ${x}$ is........... .