The EMF of the element is 15 V, the internal resistance is r = 1 Ohm, the resistance of the external

The EMF of the element is 15 V, the internal resistance is r = 1 Ohm, the resistance of the external circuit is 4 Ohm. what is the short circuit current?

To find out the required short-circuit current (it is necessary to take into account that R (resistance of the external circuit) → 0), we use the formula: Isc = ε / r, where ε is the EMF in the specified element (ε = 15 V); r – internal resistance (r = 1 Ohm).

Let’s perform the calculation: Ikz = ε / r = 15/1 = 15 A.

Answer: In the specified element, the short-circuit current, according to the calculation, should be 15 A.