A charge 2 C of is moved from a point 2 m away from a charge of 1 C to a point 1 m away from that ch

Question

A charge 2 C of is moved from a point 2 m away from a charge of 1 C to a point 1 m away from that charge. The work done in doing so is\

Professor PC Thomas Classes · Answer

Initial PE $=9 	imes 10^{9} \frac{\mathrm{q}_{1} \mathrm{q}_{2}}{\mathrm{~d}_{1}}=\frac{9 	imes 10^{9} 	imes 2 	imes 1}{2} \mathrm{~J}$ Final PE $=\frac{9 	imes 10^{9} 	imes 2 	imes 1}{1} \mathrm{~J}$\ Work done = difference in PE\