### Magnetism and Matter

goals
Electromagnets are used in
Angle of dip at a place is $30^0$. If the vertical component of earth's magnetic field at that point is $7.5\times 10^{-5}T$. then the total magnetic field of earth at that point will be :
Figure shown above illustrates a basic magnetization curve of iron (commercial purity grade).
Figure shown above illustrates a basic magnetization curve of iron (commercial purity grade).
 P Q R Magnets Magnetic Substances Non Magnetic Substances