Question

Find the potential at point B –

• A.
  • 12 V
• B. – 12V
• C. +6 V
• D. – 6 V

Answer 1

Answer: (B)

– 12V

Answer 2

V_A – V_B = + 6 + 2 × 3 – 9 + 3 × 3

= 6 + 6 – 9 + 9 = 12

Now since V_A = 0 ∴ V_B = – 12 V