Question

# Two point charges q and âˆ’2q are placed some distance d apart. If the electric field at the location of q due to âˆ’2q is E, than at the location of âˆ’2q due to q is ( No external Field is present )

A
E2
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B
2E
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C
E2
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D
4E
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Solution

## The correct option is B −E2Let the distance between two charges be d.Considering the electric field of −2q.|E|=|k(−2q)r2|=2kqr2The direction of this electric field will be towards the charge −2qConsidering the electric field due to q only:Electric field =|kqr2|=E2The direction of this electric field will be away from the charge q which is same as direction of electric field due to charge −2qHence E2 will be the right answer.

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