$A-2\mathrm{.}00C$ charge is $3\mathrm{.}00cm$ to the left of a $+1\mathrm{.}00C$

charge. Where must a $+4\mathrm{.}00C$ charge be placed to make

the net electrical force on the $+1\mathrm{.}00C$ charge zero?

Ans:

$4\mathrm{.}24cm$ left of the $1\mathrm{.}00C$ charge, $1\mathrm{.}24cm$ left of the

$-2\mathrm{.}00C$ charge