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Understanding Electrostatic Potential

12 J of work ...

Question

12 J of work has to be done against an existing electric field to take a charge of 0.01 C from A to B. How much is the potential difference V_B − V_A?

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Solution

Given:
Charge, q = 0.01 C,
Work done, W = 12 J
Now, work done = potential difference × charge
W = (V_B − V_A) × q
V_B − V_A = $\frac{12}{0.01}$ = 1200 V

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