Question

Potansial difference across a cell is 1.8 v when a current of 0.5 a is drawn from it .the potansial difference falls to 1.6 v when a current of 1.0 a drawn find the emf of the internal resistance of the cell

Answer 1

Answer:

Explanation:

1) 1.8 = E - 0.5*Ri

2) 1.6 = E - 1.0*Ri

Solving for the unknown variables,

Ri = 0.4 Ω

E = 2.0 V