The short-circuit current in the circuit of the current source with EMF 6B is 4A.

univerkov | April 2, 2021 | education

The short-circuit current in the circuit of the current source with EMF 6B is 4A. Determine the current in this circuit when a 12 ohm resistor is included in it.

Task data: Isc (short-circuit current) = 4 A; εi (EMF of the current source) = 6 V; R (resistance of the connected resistor) = 12 ohms.

1) Internal resistance: Isc = εi / r, whence we express: r = ε / Isc = 6/4 = 1.5 ohms.

2) The current strength after connecting the taken resistor: I = εi / (R + r) = 6 / (12 + 1.5) = 0.44 (4) A.

Answer: After connecting the taken resistor, the current in the circuit will be 0.44 (4) A.

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