Topic: Network Theory
The effective resistance faced by the voltage source is:
- A. 4 Ω
- B. 12 Ω
- C. 3 Ω
- D. 16 Ω
Answer: C. 3 Ω
Explanation: Since the parallel branches have the same voltage, (3i/4) * 4 = (i/4) * R, which gives R = 12 Ω. The equivalent resistance faced by the source is R_eq = 12 || 4 = 3 Ω.