First slide

Electrostatic potential

Question

The figure gives the electric potential V as a function of distance through five regions on x-axis. Which of the following is true for the electric field E in these regions?

Moderate

A

$E_{2} = E_{4}, E_{5} = 0 and E_{3} > E_{1}$
B

$E_{1} = E_{3} = E_{5} and E_{2} < E_{4}$
C

$E_{2} = E_{4} = E_{5} and E_{1} < E_{3}$
D

$E_{1} < E_{2} < E_{3} < E_{4} < E_{5}$

Solution

Electric field in the region 1, 3 and 5 is zero i.e., E₁ = E₃ = E₅
Slope of the line BC< Slope of the line DE i.e., E₂ < E₄

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