I*r + I*R = 2 volts.
0.5*1 + 0.5R = 2,
R = 3 ohms.
if a cell supplies a current of 0.5a when it's emf is 2v and internal resistance is 1 ohms calculate it's external resistance a). 0.5ohms b). 1ohms c). 2ohms d). 2.5ohms e). 3ohms?
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