Question: What is the total current in a parallel circuit with two branches, where one branch has a resistance of 4Ω and the other has 6Ω, connected to a 12V source?

Options:

1. 2A
2. 3A
3. 4A
4. 6A

Correct Answer: 3A

Solution:

First, find the equivalent resistance: 1/R_eq = 1/4 + 1/6 => R_eq = 2.4Ω. Then, I = V / R_eq = 12V / 2.4Ω = 5A.