As performed in the real lab:
A cardboard, a circular coil, a battery, a key and iron filings.
- Take a cardboard with two holes in it.
- Pass a circular coil having large number of turns through these holes such that half the coil is above it and the remaining part is below the cardboard.
- Connect the free ends of the coil to a battery, and a plug key in series.
- Sprinkle iron filings on the cardboard and plug the key.
- Tap the cardboard few times and observe the pattern of iron filings that is formed on cardboard.
As performed in the Simulator:
- In 'Controls' section, vary the amplitude of the current and turn density of the coil by adjusting the respective sliders
- Observe the magnetic field intensity around the coil. You can rotate the coil to view the intensity.
- Click 'Reverse the current direction' check box to change the direction of current and observe the change in direction of magnetic field.
- Click on 'Observations' to get a better insight of the lab.
- You will observe that the field lines inside the solenoid are in the form of parallel straight lines.
- When the current is reduced to 0, magnetic field intensity around the solenoid reduces to 0.
- When we increase the amplitude of 'current' or the 'coil turn density', the magnetic field intensity around the solenoid increases.
- When we reverse the direction of current the polarity of the solenoid is also reversed.