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  • A solid cylinder of radius R carrying on current I . Find the magnetic field at a point P due to cylinder is P is at <img alt="r>R" src="https://entrancecorner.oncodecogs.com/gif.

A solid cylinder of radius R carrying on current I . Find the magnetic field at a point P due to

cylinder is P is at r>R

Option: 1

\frac{\mu _0I}{r}


Option: 2

0


Option: 3

\frac{\mu _0I}{2\pi r}


Option: 4

\frac{\mu_ 0I}{4\pi r}


Answers (1)

best_answer

As we have learned

Magnetic field outside the solid cylinder -

 

B_{surface}=\frac{\mu_{o}i}{2\pi R}

 

 

 

 

According to Ampere  \oint \vec{B}\cdot \vec{dl}= \mu _0I

\oint B\times 2\pi r= \mu _0 I

B = \frac{\mu _0}{2 \pi r}

 

 

 

 

 

Posted by

Ritika Jonwal

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