Observe the given network and answer the question? The potential at point a = ?

• A. E1 − I1R1
• B. E1 − I1R1 & I3R3
• C. I3R3
• D. I2R2

Answer: (B)

For the given network the potential at point a can be found by applying KVL.
For loop 1
Va = E1 − I1R1
Va = I3R3
For loop 2
Va = E2 − I2R2