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As shown in the figure a charge +2 C is...

As shown in the figure a charge `+2` C is situated at the origin O and another charge `+5` C is on the x -axis at the point A . The later charge from the point A is then brought to a point Bon the y - axis . The work done is
`("given"(1)/(4piepsilon_(0))=9xx10^(9))`

A

`45xx10^(9)J`

B

`90xx10^(9)J`

C

zero

D

`-45xx10^(9)J`

Text Solution

Verified by Experts

The correct Answer is:
c
Here OB= 2 m and OA =2m

Work done `=U_("final")-U_("initial")`
`=(1)/(4piepsilon_(0))((+5)xx(+2))/(2)-(1)/(4piepsilon_(0))((+5)xx(=2))/(2)=0`
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