At the corners A, B, C of a square ABCD, charges 10mC, -20mC and 10mC are placed. The electric intensity at the centre of the square to become zero, the charge to be placed at the corner D is

At the corners A, B, C of a square ABCD, charges 10mC, -20mC and 10mC

1.	At the corners A, B, C of a square ABCD, charges 10mC, -20mC and 10mC are placed. The electric intensity at the centre of the square to become zero, the charge to be placed at the corner D is
Answer» `-20MC` `+20mc` `30mC` `-30mC` ANSWER :A

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At the corners A, B, C of a square ABCD, charges 10mC, -20mC and 10mC are placed. The electric intensity at the centre of the square to become zero, the charge to be placed at the corner D is

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