The EMF of the current source is 40 V. The rotation of the outer section of the circuit is 36 OHM,

| June 22, 2021 | education

The EMF of the current source is 40 V. The rotation of the outer section of the circuit is 36 OHM, and the inner section is 4 OHM. Determine the current in the circuit and the voltage on the outer section of the circuit.

EMF = 40 V.

R = 36 ohms.

r = 4 ohms.

I -?

U -?

According to Ohm’s law for a closed loop, the current in the loop I is directly proportional to the electromotive force of the EMF current source and is inversely proportional to the sum of the external resistance R and the internal resistance of the current source r: I = EMF / (R + r).

I = 40 V / (36 ohms + 4 ohms) = 1 A.

We express the voltage on the outer section of the circuit U from Ohm’s law for the section of the circuit: I = U / R.

U = I * R.

U = 1 A * 36 Ohm = 36 V.

Answer: the current in the circuit is I = 1 A, the voltage on the outer part of the circuit is U = 36 V.



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