Respuesta :
The length of the bar magnet, when turned 180 degrees to face the magnetic field, is 11.1 cm.
The null points on the equatorial line are formed when a bar magnet is rotated by 180°. Consequently, the magnetic field on the equatorial line at a distance d′ is given by
[tex]B^{\prime}=\mu 0 M \div 4 \pi d^{\prime} 3=H[/tex]----------------(1)
Since the magnetic field is equal to the earth's magnetic field's horizontal component.
Magnetic field, as we are knows,
[tex]$\mathrm{B}_1=\frac{\mu_0 2 \mathrm{M}}{4 \pi \mathrm{d}^3}=\mathrm{H}$[/tex] ————————————— (2)
The result of (1) and (2) is we have
[tex]$\begin{aligned}&\frac{\mu_0 \mathrm{M}}{4 \pi \mathrm{d}^{\prime 3}}=\frac{\mu_0 2 \mathrm{M}}{4 \pi \mathrm{d}^3} \\&\mathrm{~d}^{\prime 3}=\frac{\mathrm{d}^3}{2}=\frac{14^3}{2} \\&\mathrm{~d}^{\prime}=11.1 \mathrm{~cm}\end{aligned}$[/tex]
As a result, the null points are 11.1 cm away from the equator on the equatorial line.
What does magnetic field mean ?
Magnetic forces can be seen in a magnetic field, an electric current, a changing electric field, or a vector field around a magnet.
To learn more about magnetic field, visit:
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