Difference between Bar magnet and Solenoid
Bar magnet
1) Bar magnet is the most commonly used type of permanent magnet which can able to produce uniform magnetic field in certain region.
2) The strength of bar magnet is concentrated at the ends of magnet termed as North Pole and South Pole.
3) The magnetic lines of forces produced due to bar magnet are shown below,
4) The direction of magnetic field produced by bar magnet at certain point can be studied by drawing the tangent to given point.
5) Magnetic lines inside bar magnet travels from South Pole to North Pole.
Solenoid
1.) An insulated copper wire wrapped with ‘N’ turns on cylindrical rod called as solenoid.
2.) When current is sent to the solenoid magnetic field is produced around it.
3.) The direction of magnetic field can be demonstrated using right hand thumb rule.
4.) Magnetic lines of forces around solenoid are shown in figure below,
5) The lines of forces along axis of each turn in solenoid contributes magnetic field which is similar to magnetic field produced by bar magnet.
6) Magnetic field produced outside the solenoid is very weak hence can be neglected.