1.

Two cells, e.m.f. of each is \[E\] and internal resistance \[r\] are connected in parallel between the resistance \[R\]. The maximum energy given to the resistor will be, only when [MNR 1988; MP PET 2000; UPSEAT 2001]

A.                    \[R=r/2\]
B.                                      \[R=r\]
C.                    \[R=2r\]                          
D.            \[R=0\]
Answer» B.                                      \[R=r\]


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