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A cell of e.m.f. ε and internal resistance r sends current 1.0 A when it is connected to an external resistance 1.9 Ω but it sends current 0.5 A when it is connected to an external resistance 3.9Ω. Calculate the values of ε and r.

Answer»

A cell of e.m.f. ε and internal resistance r sends current 1.0 A when it is connected to an external resistance 1.9 Ω but it sends current 0.5 A when it is connected to an external resistance 3.9Ω. Calculate the values of ε and r.



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