A clock face has negative charges − q , − 2 q , − 3 q , ……… , − 12 q fixed at the positions of the corresponding numerals on the dial. Assume that the clock hands do not disturb the net field due to p

Question

A clock face has negative charges − q , − 2 q , − 3 q , ……… , − 12 q fixed at the positions of the corresponding numerals on the dial. Assume that the clock hands do not disturb the net field due to point charges. If at time AB : CD the hour hand points in the same direction as electric field at the centre of the dial, then find A + B + C + D .

TestHub · Accepted Answer

Pair charges at opposite clock positions and sum their fields at the centre vectorially. The net field points in the direction marked by the hour hand at 9:30. A + B + C + D = 9 + 0 + 3 + 0 = 12

Physics - Electrostatics Question with Solution | TestHub

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