Question Detail
Question
External resistance R connected to cell of internal resistance r. Current is maximum when
Correct Answer
Option A is the correct answer.
Detailed Explanation
I = E/(R+r). Maximum current when R is minimum (R=0). Among given, R < r is closest (but not zero). Often asked for max power transfer (R=r), but max current is R=0.
Hint
I max when R=0.