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The shape of the earth's magnetic field resembles that of an imaginary:
(a) U-shaped magnet
(b) Straight conductor carrying current
(c) Current-carrying circular coil
(d) Bar magnet
Explain what you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet?
In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earth's magnetic field alone.
Define the agonic line.
Write the properties of magnetic lines of force.
The relation between weber and Tesla is ______.
The magnetic field lines are stronger near the ______ and it diminishes as you go away from it.
