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Question: Answered & Verified by Expert
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
PhysicsCurrent ElectricityJEE Main
Options:
  • A $R=r / 2$
  • B $R=r$
  • C $R=2 r$
  • D $R=0$
Solution:
1887 Upvotes Verified Answer
The correct answer is: $R=r / 2$
For maximum energy, we have External resistance of the circuit = Equivalent internal resistance of the circuit i.e. $R=r / 2$

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