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  • A straight section P Q of a circuit lies along the x-axis from  <img alt="\mathrm{x= -a / 2~ to~ x=a / 2}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7Bx%3D%20-a%

A straight section P Q of a circuit lies along the x-axis from  \mathrm{x= -a / 2~ to~ x=a / 2} and carries a current I. The magnetic field due to the section P Q at point x=+a will be

Option: 1

proportional to a


Option: 2

proportional to \mathrm{a^2 }


Option: 3

proportional to  \mathrm{\frac{1}{a}}
 


Option: 4

equal to zero


Answers (1)

best_answer

The point x=+a lies along the line of the straight section P Q of the circuit. Hence the magnetic field at point x=a is zero.

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Gaurav

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