STANDARD Physics Electric Forces MCQ Question
Four point charges are placed at the corners of a square ABCD of side 10 cm, as shown in figure. The force on a charge of 1 μC placed at the centre of square is
7 N
8 N
2 N
zero
Correct Answer
Detailed Explanation
Forces of repulsion on 1 μC charge at O due to 3 μC charges at A and C are equal and opposite, cancelling each other. Similarly, forces of attraction due to −4 μC charges at B and D cancel each other. Hence, the net force is zero.
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