Determine the value of current I1 (in A) and V1 (in V) respectively, for the given circuit below.

• A. 4, 32
• B. −4, 32
• C. 6, 30
• D. −6, 30

Answer: (A)

According to Kirchhoff’s Current Law: At any point in an electrical circuit, the sum of currents flowing towards that point is equal to the sum of currents flowing away from that point.
∴ I1 = 1 + 3 = 4A
V = IR
∴ V1 = I1R = 8 × 4
V1 = 32Ω