if a charge q is placed at the centre of the line joining two equal charges Q such that the sytem is in equilibrium then the value of q is?
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Anything.. As the value of the forces exerted by Q1 on q and Q2 on q will be equal in magnitude and opposite in direction.. So they'll nullify each other
sanivas:
but it is not in option
I realised my mistake.. it should be - Q/4..balance forces about any one of the given positive charges..
coz I balanced it about q which is an idiotic mistake as the charge is unknown
ok thanks
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