Does magnetic field strength change with current ?
Important Questions on Magnetism and Electromagnetism
Observe the diagram.
The magnetic poles represented by P and Q respectively are
A bar magnet is used to pick up an iron nail
At which part P, Q, and R is the easiest for the magnet to pick up the iron nail?
The diagram below shows a magnetic needle kept just below the conductor AB which is kept in the North-South direction.
i) In which direction will the needle deflect when the key is closed?
ii) Why is the deflection produced?
iii) What will be the change in the deflection if the magnetic needle is taken just above the conductor AB?
iv) Name one device which works on this principle.
The figure shows the magnetic field lines of a magnetic field. There are three points , and in this field. Choose the correct option regarding field strength.
Write characteristics of magnetic field lines.
