GATE 2024 Electrical Engineering Q52

Question

The given equation represents a magnetic field strength $\vec{H}(r, 	heta, \phi)$ in the spherical coordinate system, in free space. Here, $\hat{r}$ and $\hat{	heta}$ represent the unit vectors along r and $	heta$, respectively. The value of P in the equation should be ________ (rounded off to the nearest integer).
$\vec{H}(r,	heta,\phi) = \frac{1}{r^3}(\hat{r}P \cos 	heta + \hat{	heta} \sin 	heta)$