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प्रश्न
What is the magnetic field on the equatorial line of a short bar magnet?
पर्याय
\[B_{\mathrm{eq}}=\frac{\mu_0}{4\pi}\frac{m}{r^3}\]
\[B_{\mathrm{eq}}=-\frac{\mu_0}{4\pi}\frac{m}{r^3}\]
\[B_{\mathrm{eq}}=-\frac{\mu_0}{4\pi}\frac{m}{r^2}\]
\[B_{\mathrm{eq}}=-\frac{1}{4\pi\epsilon_0}\frac{m}{r^3}\]
MCQ
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उत्तर
On the equatorial line, the stated field is \[B_{\mathrm{eq}}=-\frac{\mu_0}{4\pi}\frac{m}{r^3}\]. The negative sign specifies its direction relative to the magnetic dipole moment vector.
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