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A point charge of 100mu C is placed at 3...

A point charge of `100mu C` is placed at `3 hat j+4 hat j m`. Find the electric field intensity due to this charges at a point located at `9 hat j+12 hat j m`.

A

`8000Vm^(-1)`

B

`9000Vm^(-1)`

C

`2250Vm^(-1)`

D

`4500Vm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`vec(r )=(9-3) hat i+(12-4)hat j=6 hat(i)+8 hat(j)`
or, `r=sqrt(6^(2)+8^(2))=10m`
`E=(9xx10^(9)xx100xx10^(-6))/(10^(2))=9000Vm^(-1)`.
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