MCQ
As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge -Q from the point A [co-ordinates (0, a) ] to another point B [co-ordinates (a, 0)] along the straight path AB is
- ✓Zero
- B$\left(\frac{-q Q}{4 \pi \varepsilon_0} \frac{1}{a^2}\right) \sqrt{2} \mathrm{a}$
- C$\left(\frac{q Q}{4 \pi \varepsilon_0} \frac{1}{a^2}\right) \frac{a}{\sqrt{2}}$
- D$\left(\frac{q Q}{4 \pi \varepsilon_0} \frac{1}{a^2}\right) \sqrt{2} \mathrm{a}$
