When a 2μC charge is carried from point A to point B, the amount of work done by the electric field is 50 μJ. What is the potential difference and which point is at a higher potential?
Both are at same potential
25V,A
20V,B
25V,B
A
25V,B
B
20V,B
C
Both are at same potential
D
25V,A
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Solution
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Work done by electric field to carry charge from A to B Weq=q(VA−VB) or 50×10−6=2×10−6(VA−VB) or VA−VB=25V The answer is positive thus A is at higher potential.
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