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The point charges having equal charges s...

The point charges having equal charges separated by 1 distance experiences a force of 8N. What will be the force experienced by them, if they are held in water at the same distance ?

Text Solution

Verified by Experts

Given :
`K_(W)=(F_("air"))/(F_("water")) " "( F_("air")=8N)`
`F_("water")=(F_("air"))/(K_(W))=(8)/(80)=(1)/(10)N`
Note :
`F=(1)/(4 pi epsi_(0))=(q_(1)q_(2))/(r^(2))`
`F_(m)=(1)/(4pi epsi_(0) epsi_(r))(q_(1)q_(2))/(r^(2))`
`(F)/(F_(m))= epsi_(r) rArr [ :. (F_("air"))/(F_("water"))=K_("water")]`
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