magnetic field due to a current in a solenoid
Answers
1)Take a wooden plank covered with white paper.
2) Make holes on its surface.
3) Pass copper wire through holes.
4) Join the ends of the coil to a battery through
switch.
5) Current passes through the coil, when we
switch on the circuit.
6) Now sprinkle iron filings on the surface of the plank, around the coil. Then orderly pattern of iron filings is seen on the paper.
7) The iron filings arrange themselves in orderly
way and look like lines of force.
8) The long coil is known as solenoid. The direction
of the field due to solenoid is determined by using right hand rule.
9) One side of the solenoid behaves like north pole and the otherside behaves like south pole.
10) Outside the solenoid the direction of lines of force is from north to south while inside the direction is from south to north. Thus the magnetic field lines are closed
loops.
11) Hence electric charges in motion produce magnetic field.