Magnetism and Matter

I : at high temperature, ferromagnet becomes paramagnet.

II : at high temperature, domains of ferromagnet will break

Let the true dip is $\delta$ $$ and apparent dip is $\delta \text{'}$ $$ , so

$tan\delta \text{'}=\frac{B_V}{B_{H}cos\theta }=\frac{tan\delta }{cos\theta }\Rightarrow tan\delta =tan\delta \text{'}cos\theta =tan45°cos30°=1*\frac{\sqrt[]{3}}{2}$

$\Rightarrow \delta =ta{n}^{-1}\left(\frac{\sqrt[]{3}}{2}\right)$

$\frac{\Delta M}{M}=\frac{\Delta \mu }{\mu }=\frac{250}{500}=\frac{1}{2}$

Gauss law for magnetism states that total magnetic flux through a closed surface S will be zero. It is one of the four maxwell's equations that is useful in understanding the prinicples of electromagnetism. When understood in depth, the law implies that magnetic field lines form closed loops since they are continous. In short, it confirms that magnetic monopoles cannot exist.

A ring magnet is a type of strong and permanent magnet which is made from the alloy of iron, boron and neodymium. These are the part of rare-earth magnet family which is the reason behind their the strongest magnetic properties amongst all other permanent magents.

A U-shaped magnet is another type of bar magnet. This is known as a horseshoe magnet since its shapes resembles the object called horseshoe. The two ends of this U-shaped magnet are its magnetic poles. Configration of these magnetic poles creates a concentrated magnetic field. This concentrated magnetic field makes it much more stronger than a simple and straight bar magnet.

The two points in a bar magnet are its North pole and South pole. A bar magnet has magnetic field lines around it. These points give these field lines a travelling direction. For example, the magnetic field lines emerge form the North pole of the bar magnet and then they curve toward South pole. This makes a complete loop of magnetic field lines around the bar magnet.

Given, x = 99

${\mu }_0=4\pi *10^{-7}Wb/A-m$

${}_{}$ ${\mu }_m=?$   (Permeability of the material)

${\mu }_m=4\pi *10^{-5}$

$x=$ retentivity

$y=$ coercivity

$\mathrm{z}=$ saturation magnetization