Two charges `+3muC and +4muC` are placed in free space 12m apart. What is the potential at the midpoint on the line joining these two charges?

Explanation

Data supplied, `q_(1)=+3muC =+3 xx 10^(-6)C, q_(2)=4muC=4 xx 10^(-6)C`
`r_(1)=6cm," "r_(2)=6cm`
Potential at C, `(1)/(4pi epsi_(0)).(q_(1))/(r_(1)) +(1)/(4pi epsi_(0)) .q_(2)/r_(2)=(9 xx 10^(9) xx 3 xx 10^(-6))/(6)+(9 xx 10^(9) xx 4 xx 10^(-6))/(6)`
`=4.5 xx 10^(3)+6 xx 10^(3)=10.5 xx 10^(3)"volts"=10.5kV`