Calculate the current in the 3Ω resistor shown in
the diagram above.
Attached Figure / Diagram
A
3.0A
B
4.0A
C
4.3A
D
12.0A
E
39.0A
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Total Resistance R = 1/R = 1/R1 + 1/R2 + 1/R3
R = 12/13Ω
V = IR = (12/13) x 13 = 12v
1 across 3Ω = V/R = 12/3 = 4A
Source: Myschool Past Questions Archive (Record #24118)