Question

what are the condition for R to be maximum?​

Answer 1

Answer:Answer. R is maximum when Cos ( A, B) = +1 ie angle between vectors A and B is zero ie vectors A and B are parallel to each other.

Answer 2

$\huge \sf \color{skyblue}{answer}$

$\implies \: \sf \: The \: maximum \: current \: can \: be \: drawn \: from \: a \: cell \: if$

$\sf \: the \: external \: \: resistance \: R = 0.$