Question:
If $\mu_0$ is absolute permeability of vacuum and $\mu_r$ is relative magnetic permeability of another medium, then permeability $\mu$ of the medium is
If $\mu_0$ is absolute permeability of vacuum and $\mu_r$ is relative magnetic permeability of another medium, then permeability $\mu$ of the medium is
Updated On: Jun 23, 2023
- $\mu_0 , \mu_r$
- $\mu_0 / \mu_r$
- $\mu_r/ \mu_0$
- $1 /\mu_0 , \mu_r$
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The Correct Option is A
Solution and Explanation
If $\mu_{0}$ represents the permeability of free space and $\mu$ represents the permeability of a particular substance,
then the relative permeability $\mu_{ r }$ of that substance is given by:
$\mu_{r}=\frac{\mu}{\mu_{0}}$
$\Rightarrow \mu=\mu_{0} \mu_{ r }$
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Concepts Used:
Magnetism & Matter
Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.
Magnetite is the world’s first magnet. This is also called a natural magnet. Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.
Read More: Magnetism and Matter
Some of the properties of the magnetic field lines are:
- The lines and continuous and outside the magnet, the field lines originate from the North pole and terminate at the South pole
- They form closed loops traversing inside the magnet.
- But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
- More number of close lines indicate a stronger magnetic field
- The lines do not intersect each other
- The tangent drawn at the field line gives the direction of the field at that point.