Write Gauss’s law for magnetism.
Give the explanation of Gauss’s law for magnetic field.
A magnet of magnetic moment $M$ and pole strength $m$ is divided in two equal parts, then magnetic moment of each part will be
A closely wound solenoid of $800$ turns and area of cross section $2.5 \times 10^{-4} \;m ^{2}$ carries a current of $3.0\; A .$ Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?
Write a brief history of magnet.
A magnetic needle is kept in a non-uniform magnetic field. It experiences