The magnetic field due to a current carrying square loop of side a at a point located symmetrically at a distance of $a/2$ from its centre (as shown is)

131-144

  • A

    $\frac{{\sqrt 2 \,{\mu _0}i}}{{\sqrt 3 \,\pi \,a}}$

  • B

    $\frac{{{\mu _0}\,i}}{{\sqrt 6 \,\pi \,a}}$

  • C

    $\frac{{2\,{\mu _0}i}}{{\sqrt 3 \,\pi \,a}}$

  • D

    zero

Similar Questions

Two concentric coils each of radius equal to $2\pi \,{\rm{ }}cm$ are placed at right angles to each other. $3$ $ampere$ and $4$ $ampere$ are the currents flowing in each coil respectively. The magnetic induction in $Weber/{m^2}$ at the centre of the coils will be $({\mu _0} = 4\pi \times {10^{ - 7}}\,Wb/A.m)$

  • [AIIMS 2008]

Given below are two statements:

Statement $(I)$: When an object is placed at the centre of curvature of a concave lens, image is formed at the centre of curvature of the lens on the other side.

Statement $(II)$: Concave lens always forms a virtual and erect image.

In the light of the above statements, choose the correct answer from the options given below:

  • [JEE MAIN 2024]

A cell is connected between the points $A$ and $C$ of a circular conductor $ABCD$ of centre $O$ with angle $AOC = {60^o}$. If ${B_1}$ and ${B_2}$ are the magnitudes of the magnetic fields at $O$ due to the currents in $ABC$ and $ADC$ respectively, the ratio $\frac{{{B_1}}}{{{B_2}}}$ is

Give Oersted’s observation.

Find out magnetic field at point $O$ ?