Question
Question: In the circuit shown if point O is earthed, the potential of point X is equal to 
A
10 V
B
15 V
C
25 V
D
12.5 V
Answer
15 V
Explanation
Solution
VA – VB = 5V
– 5 + 5i – 10 + 5 = 0 (kirchoff equation )
i = 2 Amp
Vx – Vo = + 10 – 5 + 5 × i
Vx = 5 + 5 × 2 = 15 volt