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By a cell a current of 0.9 A flows throu...

By a cell a current of 0.9 A flows through 2 ohm resistor and `0.3 A` through 7 ohm resistor. The internal resistance of the cell is

A

`1.0Omega`

B

`0.5Omega`

C

`2.0Omega`

D

`1.2Omega`

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