Electric Potential at a Point in Space Due to a Point Charge Q
A charge 4 C ...
Question
A charge 4C is placed at the origin, what is the electric potential at a point (3,4,0)?
A
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B
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C
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D
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Solution
The correct option is A So what is the formula to find potential a point r distance away from a charge Q? V=kQr But here in this question instead of giving r, we are given that the point is at (3,4,0) and charge Q=4C is at origin (0,0,0). So to get r, we use distance formula. r=√(3−0)2+(4−0)2+(0−0)2 r=√25 r = 5 Now, At (3,4,0), V=k×45 V=4k5 And potential is a scalar. Not a vector. So there can be no alongwith it.