A straight section $P Q$ of a circuit lies along the $X$ axis from $x = - a / 2$ to $x = a / 2$ and carries a steady current $I$ .Then the magnetic field due to the $P Q$ section at a distance $x = + a$ will be:

proportional to

a

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proportional to

1 / a

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proportional to

a^{2}

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z e r o

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Solution

The correct option is D $z e r o$
Magnetic field in the line of conductor is zero. As conductor is placed along x-axis and $\to B$ is measured at $x = a$ , $\to B$ will be zero.

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A straight section PQ of a circuit lies along the X axis from x=−a/2 to x=a/2 and carries a steady current I .Then the magnetic field due to the PQ section at a distance x=+a will be:

The correct option is D zeroMagnetic field in the line of conductor is zero. As conductor is placed along x-axis and →B is measured at x=a, →B will be zero.

A straight section $P Q$ of a circuit lies along the $X$ axis from $x = - a / 2$ to $x = a / 2$ and carries a steady current $I$ .Then the magnetic field due to the $P Q$ section at a distance $x = + a$ will be:

The correct option is D $z e r o$
Magnetic field in the line of conductor is zero. As conductor is placed along x-axis and $\to B$ is measured at $x = a$ , $\to B$ will be zero.