EMF of the current source is 10V. When a 20Om resistance was connected to it, the current in the circuit was 4A.
| November 20, 2020 | education
EMF of the current source is 10V. When a 20 Om resistance was connected to it, the current in the circuit was 4A. Determine the short-circuit current.
The short-circuit current is found by the formula I = E / r, where E is the EMF, and r is the internal resistance.
We find the internal resistance from the formula I = E / R + r, where R is the resistance of the circuit. So r = E / I-R = 10 / 4-2 = 0.5 Ohm.
This means that the short-circuit current is I = 10 / 0.5 = 20 A.
Answer: 20 A.
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