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What is the magnetic field at the centre...

What is the magnetic field at the centre of the circular ( as shown in figure ), when a single wire is bent to form a circular loop and extands to from straight section

A

`(mu_(0)I)/(2R)otimes`

B

`(mu_(0)I)/(2R)(1+(1)/(pisqrt(2)))odot`

C

`(mu_(0)I)/(2R)(1-(1)/(pisqrt(2)))odot`

D

`(mu_(0)I)/(2R)(1+(1)/(pisqrt(2)))otimes`

Text Solution

Verified by Experts

`B_(AB)=(mu_(0)I)/(4piR)[sin90^(@)+sin(-45^(@))]ox`
`B_(BC)=(mu_(0)I)/(4piR)[sin90^(@)+sin45^(@)]o.`
`B_(0)=B_(AB)+B_(BC)+B_("circular")`
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