Question

Explain the conditions for maximum current.

Answer 1

1. Current in a circuit is given by, I = \(\frac{E}{R+r}\)

2. Maximum current can be drawn from the emf device, only when R = 0, i.e.

I_max = \(\frac{E}{R}\)

3. I_max is the maximum allowed current from an emf device (or a cell) which decides the maximum current rating of a cell or a battery.