| ASSERTION: In order to have maximum current, a series combination of cells is used where their internal resistance is much smaller than the external resistance. |
| REASON: Current flowing through the circuit is inversely proportional to that resistance. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
The current flowing through the circuit is given by \[I=\frac{nE}{R+nr}\]so when R << nr, IU = E/r = current due to single cell, when R > > nr, I = nE/R = n times the current due to single cell. Thus when cell are connected in series, we get maximum current where total internal resistance of the cells is negligible.
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