Potential Energy of a Point Charge Placed at a Point with Non Zero Potential
The potential...
Question
The potential at any point (x,y,z) in a space is given by V=x2yz. The work done in moving a charge 3C from point (1,2,3) to point (3,4,1) is .
A
30 J
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B
90 J
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C
36 J
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D
6 J
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Solution
The correct option is B 90 J Work done in moving a charge from say point A to point B is given by W=q(VB−VA) where VBandVA represent the potentials of point B and A respectively.
Here the particle is moved from A (1,2,3) to B (3,4,1) VB=32.4.1=36V
and VA=12.2.3=6V
Work done = q(VB−VA)=3.(36−6)=90J