Calculate the current in the 3Ω resistor shown in
the diagram above.
- 3.0A
-
4.0A
- 4.3A
- 12.0A
- 39.0A
The correct answer is: B
Explanation
Total Resistance R = 1/R = 1/R1 + 1/R2 + 1/R3R = 12/13Ω
V = IR = (12/13) x 13 = 12v
1 across 3Ω = V/R = 12/3 = 4A