KcetElectrostaticsKCET 2017MCQ+1 / -02017Two point charges $A=+3 \mathrm{nC}$ and $B=+1 \mathrm{nC}$ are placed 5 cm apart in air. The work done to move charge $B$ towards $A$ by 1 cm isA $2.0 \times 10^{-7} \mathrm{~J}$B $2.7 \times 10^{-7} \mathrm{~J}$C $12.1 \times 10^{-7} \mathrm{~J}$D $1.35 \times 10^{-7} \mathrm{~J}$Check AnswerClear SelectionReveal AnswerShow Explanation
