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A battery of emf epsilon and internal re...

A battery of emf epsilon and internal resistance r is connected across a load resistance `R_L` . The plot between output power and load resistance is shown in the figure. The value of emf epsilon and internal resistance r respectively will

A

`20 V`, `2 Omega`

B

`10 V`, `2 Omega`

C

`20 V`, `1 Omega`

D

`10 V`, `1 Omega`

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