MCQ
Charge $Q$ is given a displacement $\vec r = a\hat i + b\hat j$ in an electric field $\vec E = E_1\hat i + E_2\hat j$ . The work done is
- ✓$Q({E_1}a + {E_2}b)$
- B$Q\sqrt {{{({E_1}a)}^2} + {{({E_2}b)}^2}} $
- C$Q({E_1} + {E_2})\sqrt {{a^2} + {b^2}} $
- D$Q\sqrt {({E_1}^2 + {E_2}^2)} \sqrt {{a^2} + {b^2}} $
