Q. In the circuit shown in figure, the points $F$ is grounded. Which of the following is wrong statement?
A) $D$ is at 5V
B) $E$ is at zero potential
C) The current in the circuit will be 0.5 A
D) The potential at $E$ is same whether or not $F$ is rounded
Explanation
(b) Effective emf of circuit $= 10 - 3 = 7\ V$
Total resistance of circuit$= 2 + 5 + 3 + 4 = 14\Omega$
Current, $i = 7/14 = 0.5\ A$
Potential difference between $A$ and $D$ $= 0.5 \times 10 = 5V$
Potential at $D = 10 - 5 = 5V$
Hence, $E$ cannot be at zero potential, as there is potential drop at $E$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.