Asked by Raymond
Equal charges of value +q are placed of the orders A,B,C of a square ABCD having size of length l. At the corner D, there is a point charge -2q.
what is the electric field strength at the centre of the square
what is the electric field strength at the centre of the square
Answers
Answered by
bobpursley
Easy. Corner opposite D has a charge of q, so net field inbetween is from D excess -q. The two charges on the adjacent corners, q at each, have fields equal and opposite in direction, so cancel.
Net field is due to - q at D, or E=k(-q)/distance where distance= .707 l
Net field is due to - q at D, or E=k(-q)/distance where distance= .707 l
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