Question

Two charged particle of charge +2q & âˆ’q are kept at some distance .A particle of charge +2q exerts a force F on a particle of charge âˆ’q. Find out the force exerted by the particle of charge âˆ’q on the particle of charge +2q?

A
1/2F
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B
0
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C
2F
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D
F
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E
F
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Solution

The correct option is E −FAs the given charges are opposite ,there will attract each other.it means charge +2q pulls the charge −q towards itself and same activity will be done by charge −q ,they exert force on each other in opposite direction direction. now , electrostatic force between them F=14πε2q×qr2 that is the force exerted by one charge on another therefore −q will exert equal force on charge +2q but in opposite direction i.e −F

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