question_answer

Charges q, 2q, 3q and 4q are placed at the corners A, B, C and D of a square as shown in the following figure. The direction of electric field at the centre of the square is along [MP PMT 2004

A)            AB

B)                                      CB

C)            BD

D)            AC

Correct Answer: B

Solution :

  \[{{E}_{A}}=E,\,{{E}_{B}}=2E,\,{{E}_{C}}=3E,\,{{E}_{D}}=4E\]