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When current supplied by a cell to a cir...

When current supplied by a cell to a circuit is `0.3 A`, its terminal potential difference is 0.9 A. When the current supplied becomes 0.2 A, its terminal potential difference becomes 1.0 V . The internal resistance of the cell is

A

`0.5 Omega`

B

`2Omega`

C

` 1.2 Omega`

D

`1 Omega `

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