work done by ant

JEE Advanced Questions › General Physics questions › work done by ant

a dipole is placed with its two ends having charges q and -q 2L distance apart . An ant having charge +Q on his body moves fom infinity to a point r distance apart from dipole along dipole equatorial line . wt is the work done by ant in doing so??????????????

#Physics #General Physics

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3 Answers

1

sachi sharma ·2010-09-23 06:04:16

i suppose it should be 0

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harrys ·2010-09-24 07:26:51

ans is 0

W=initial energy - final energy

I.E = kqQ/âˆž - kqQ/âˆž = 0 ( Becoz something divide by âˆž = 0 )
P.E = kqQ/2L - KqQ/2L = 0

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Aashish Jindal ·2010-10-03 09:41:41

Itz o bcoz potential at equitorial line and at âˆž is o

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