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An element Delta l= Delta x hat i is pla...

An element `Delta l= Delta x hat i` is placed at origin and carries a current I=10A. IF `Delta x=1cm` magnetic field at point P is….. T.

A

`-4 times 10^-8 hat j`

B

`4 times 10^-8 hat j`

C

`4 times 10^-8 hat i`

D

`4 times 10^-8 hat k`

Text Solution

Verified by Experts

The correct Answer is:
D
Here answer is written after making correction in the identical options.
Direction of magnetic field `(vec d B)` at point P is direction of `vec dl times vec r`= direction of `hat I times hat j`
= direction of `hat k`
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