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Electricity

Blazing goIITian

 Joined: 1 Apr 2012 Post: 381
11 Jun 2012 23:42:46 IST
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Two particles A and B each having a charge Q are placed a distance d apart. Where should a particles of charge q be placed on the perpendicular bisector of AB so that it experience maximum force?What is the magnitude of this maximum force? Want explaining answer write steps also

Hot goIITian

Joined: 7 Feb 2011
Posts: 140
12 Jun 2012 01:06:38 IST
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Net force acting f on particle of charge q is 2Fcosθ

So,

But

So

# ......(1)

For f to be maaximum,

On differentiation, x comes as

Substitute in (1) to get magnitude of force.

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