Two conductors of 20 ohms and 30 ohms are connected in series. The current of the circuit is 15 A

Two conductors of 20 ohms and 30 ohms are connected in series. The current of the circuit is 15 A, determine the impedance of the circuit, the voltage on each conductor, and the total voltage.

R1 = 20 ohms.

R2 = 30 ohms.

I = 15 A.

R -?

U -?

U1 -?

U2 -?

With a series connection of resistances, the current strength in all resistances remains the same: I = I1 + I2.

With a series connection of conductors, the total resistance R is expressed by the formula: R = R1 + R2.

R = 20 ohms + 30 ohms = 50 ohms.

We express the total voltage of the circuit from Ohm’s law: U = I * R.

U = 15 A * 50 Ohm = 750 V.

U1 = I * R1.

U1 = 15 A * 20 Ohm = 300 V.

U2 = I * R2.

U2 = 15 A * 30 Ohm = 450 V.

Answer: R = 50 Ohm, U = 750 V, U1 = 300 V, U2 = 450 V.