Question

Calculate the total current in the circuit.

(a) 20 A

(b) 10 A

(c) 11.43 A

(d) 15 A

This question was posed to me during an online exam.

Origin of the question is Parallel Networks topic in division Simple DC Networks of Basic Electrical Engineering

Answer 1

Correct choice is (c) 11.43 A

The best I can explain: The 1 ohm and 2 ohm resistor are in series which is in parallel to the 3 ohm resistor. The equivalent of these resistances (3/2 ohm) is in series with the 4 ohm and 5 ohm resistor. Total R = 21/2 ohm. I=V/R=120/(21/2)=240/21=11.43 A.