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A short magnetic needle is pivoted in a uniform magnetic field of induction IT. Now, simultaneously another magnetic field of induction sqrt3 T is applied at right angles to the first field , the needle defects through an angle theta whose value is

A

`30^(@)`

B

`45^(@)`

C

`90^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`B_(2)=B_(1)"tan"theta`
`"tan"theta=(B_(2))/(B_(1))=sqrt3/1=sqrt3`
`theta="tan"^(-1)`
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