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Consider a simple circuit shown in Fig. ...

Consider a simple circuit shown in Fig. stands for a variable resistance R'R' can vary from Ro to infinity. r is internal resistance of the battery `(r lt lt R lt R_0)`

A

Potential drop across AB is nearly constant as R' is varied.

B

Current through R' is nearly a constant as R' is varied.

C

Current I depends sensitively on R'.

D

`1 ge V//` (r+R) always.

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