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For the magnetic field to be maximum due...

For the magnetic field to be maximum due to a small element of current carrying conductor at a point, the angle between the element and the line joining the element to the given point must be

A

`0^(@)`

B

`45^(@)`

C

`90^(@)`

D

`180^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
According to Biot-Savart's law,
`dB =(mu_(0))/(4pi) (Idl sin theta)/(r^(2))`
dB will be maximum, when `sin theta` is maximum
Max. `sin theta =1 therefore theta =90^(@)`
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