Tag: magnetic field lines due to current

$He^{}$

Proton

$\alpha-particle$

$Li^{++}$

iron rod

moving charge

moving magnet

stationary charge

$ \frac {i\triangle l sin \theta}{r^2} $

$ \frac {\mu _o}{4 \pi} \frac {i \triangle l sin \theta}{r} $

$ \frac {\mu _o}{4\pi} \frac {i \triangle l sin \theta}{r^2} $

$ \frac {\mu _o}{4 \pi} i \triangle l sin \theta $

$\displaystyle dB = \frac{\mu _0 i}{4 \pi} \left ( \frac{\vec{dl} \times \vec r}{r} \right )$

$\displaystyle dB = \frac{\mu _0 i}{4 \pi} i^2 \left ( \frac{\vec{dl} \times \vec r}{r^2} \right )$

$\displaystyle dB = \frac{\mu _0 i}{4 \pi} i^3 \left ( \frac{\vec{dl} \times \vec r}{2r^2} \right )$

$\displaystyle dB = \frac{\mu _0}{4 \pi} i \left ( \frac{\vec{dl} \times \vec r}{r^3} \right )$

$\displaystyle \left ( \frac{Mv^2}{R} \right ) 2 \pi R$

$zero$

$BQ2 \pi R$

$BQv2 \pi R$

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not correct explanation of A.

A is true, but R is false

A is false, but R is true

current through it

distance from it

its length

nature of meterial

$\overline{dB}=\dfrac{\mu _{0}}{4\pi }i\left ( \dfrac{\overline{dl}\times \bar{r}}{r} \right )$

$\overline{dB}=\dfrac{\mu _{0}}{4\pi }i^{2}\left ( \dfrac{\overline{dl}\times \bar{r}}{r^{2}} \right )$

$\overline{dB}=\dfrac{\mu _{0}}{4\pi }i^{2}\left ( \dfrac{\overline{dl}\times \bar{r}}{r} \right )$

$\overline{dB}=\dfrac{\mu _{0}}{4\pi }i\left ( \dfrac{\overline{dl}\times \bar{r}}{r^{3}} \right )$

maximum

infinity

zero

finite value

$\dfrac{3\pi}{ 4}$

$\dfrac{\pi }{4}$

$\dfrac{\pi} {2}$

$2\pi $