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A cell whose internal resistance is 0 5 deliver... - JAMB Physics 2004 Question

A cell whose internal resistance is 0.5Ω delivers a current of 4A to an external resistor,The loss voltage of the cell is

A
1.250V
B
2.000V
C
8.000V
D
0.125V
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Correct Option: B

E = V + v

where E = emf of cell.

V = terminal p.d

v = loss voltage of the cell.

But from ohm's law V=IR ; v = Iv

( \implies ) lost voltage = V = Ir

= 4 x 0.5

= 2.0v

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