Assignment Set-1

A solenoid of $500$  turns per meter is carrying current of $3 \mathrm{A}.$ Its core is made of iron, which has a relative permeability of $5000.$ Determine the magnitude of magnetic intensity, intensity of magnetisation and magnetic field inside the core.

The magnetic field due to a very small magnet at a point is perpendicular to magnetic moment. Find the angle made by the line joining centre of magnet to the point and magnetic moment of bar magnet.

What is magnetic shielding? How can a space be shielded from magnetic fields?

What is pole strength of a bar magnet if its magnetic dipole moment is $4\times {10}^{-2} \mathrm{A}-{\mathrm{m}}^2$ and separation between two poles in $5 \mathrm{cm}?$

What do you mean by hysteresis? Explain it. Draw hysteresis loop and show remanence and coercivity in hysteresis loop.

The work done in turning a magnet of magnetic dipole moment $M$ by $90°$ from its stable equilibrium position is $n$ times the corresponding work done to turn it through an angle of $60°.$ Find value of $n.$

What do you mean by electromagnet? Compare permanent magnet with electromagnet.

Define terms magnetic permeability and magnetic susceptibility. Derive relation between relative permeability and susceptibility.