Question

For a Magnetic field Mapping and Electromagnetic Induction experiment, how would one explain the following:

- Why do you see a sudden deflection while you insert and remove a bar magnet

- Explain why there is no deflection when you hold a bar magnet stationary

- Explain why there was a defelection when you used a current carrying wire, instead of a magnet

Answer 1

- Why do you see a sudden deflection while you insert and remove a bar magnet

When a bar magnet is inserted and removed, the magnetic flux linked is changed and this causes the deflection.

- Explain why there is no deflection when you hold a bar magnet stationary

Here, the magnet is stationary, so there is no change in the linked flux and hence there is no deflection.

- Explain why there was a deflection when you used a current carrying wire, instead of a magnet

The current carrying wire itself produces magnetic field which is varying since the current is varying. So thye flux is constantly changing and thus the is deflection.