Two charges (= +6 UC) and Q2 E-2 UC) are brought from infinity to positions on the x-axis of x=-4 cm and x= +4 cm, respectively. How much work was done in
bringing the charges together?
Ans: W= PE = kq1q2/d, W=-1.35)​

it has to be b, about 97 percent.

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j