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As per this diagram a point charge +q is...

As per this diagram a point charge `+q` is placed at the origin `O`. Work done in taking another point charge `-Q` from the point `A(0, a)` to another point `B(a, 0)` along the staight path `AB` is:

A

`((-qQ)/(4pi in_(0)) (1)/(a^(2)))sqrt(2)a`

B

zero

C

`((qQ)/(4pi in_(0)) (1)/(a^(2)))(1)/(sqrt(2))`

D

`((qQ)/(4pi in_(0)) (1)/(a^(2)))sqrt(2)a`

Text Solution

Verified by Experts

The correct Answer is:
B
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