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    				| 1. | Three point charges of -2 C. -3 C and -3 C are kept at the vertices A, B and C respectively of an equilateral triangle of side 20 cm as shown in the figure. What should be the sign and magnitude of the charge to be placed at the mid point M of side BC so that the charge at A remain in equilibrium . | 
| Answer» Answer: Explanation: Three point charges of -2 C. -3 C and -3 C are kept at the vertices A, B and C RESPECTIVELY of an equilateral triangle of side 20 cm as shown in the figure. What should be the SIGN and magnitude of the CHARGE to be PLACED at the mid point M of side BC so that the charge at A remain in equilibrium . | |