Physics - Magnetism Question with Solution | TestHub

In a semi-infinite solenoid as shown in figure (a), the magnetic field at point ${\mathrm{P}}_2$ is half of the

In the semi-infinite solenoid shown in figure (b), the field line FGH, which passes through the very end of the winding, is a straight line from G out to infinity.

The flux through the end face of the semi-infinite solenoid is half the flux through the solenoid at a large distance back in the interior of the solenoid.

of the coil at a radius ${\mathrm{r}}_1=\sqrt{2}{\mathrm{r}}_0$, assuming $\sqrt{2}{\mathrm{r}}_0$ is less than the solenoid radius (in figure b)