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  • An arc of a circle of radius R subtends an angle  at centre, It c

An arc of a circle of radius R subtends an angle \Theta =\frac{\pi }{2} at centre, It carries a current I. The magnetic field at centre will be

Option: 1

\frac{\mu oI}{2R}


Option: 2

\frac{\mu oi}{8R}


Option: 3

\frac{\mu oi}{4R}


Option: 4

\frac{2\mu oi}{5R}


Answers (1)

As we learned

Value of K -

In SI - K =\frac{\mu _{o}}{4\pi }

In CGS - K - 1 

- wherein

\mu _{0} - absolute premability of air or vaccum

 

 B=\frac{\mu o}{4\pi}\times \frac{\Theta i}{R}= \frac{\mu o}{4\pi}\times \frac{\pi}{2}\times \frac{i}{R}\Rightarrow \frac{\mu oi}{8R}

 

Posted by

Ramraj Saini

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