A) \[\frac{E\ -V}{V}R\]
B) \[{{10}^{23}}\]
C) \[\frac{V-E}{V}R\]
D) \[\frac{V-E}{\operatorname{E}}R\]
Correct Answer: A
Solution :
| Option [a] is correct. |
| Explanation: Current in the circuit = I = V /R If r = internal resistance of the cell, then |
| V=E - Ir |
| \[\therefore \operatorname{r}=\frac{E\ -V}{I}=\frac{E\ -V}{V/R}=\frac{E\ -V}{V}R\] |
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