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In a closed circuit, the e.m.f. and inte...

In a closed circuit, the e.m.f. and internal resistance of the generator are E and r respectively. If the external resistance in the circuit is R, then Ohm's law has the form

A

`I=(E)/(Rr)`

B

`I=(E)/(R)`

C

`I=(E)/(r)`

D

`I=(E)/((R+r))`

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The correct Answer is:
D
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