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Explain the mechanism of attraction of iron nails by a magnet when brought near them.
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Explain the following :
When two pins are hung by their heads from the same pole of a magnet, their pointed ends moves apart.
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Explain the following :
Several soft iron pins can cling, one below the other, from the pole of a magnet.
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Explain the following :
The north end of a freely suspended magnetic needle gets attracted towards a piece of soft iron placed a little distance away from the needle.
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What do you understand by the term magnetic field lines?
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State four properties of magnetic field lines.
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Explain why iron filings which are sprinkled on a sheet of cardboard placed over a bar magnet take up a definite pattern when cardboard is slightly tapped.
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Explain the method of plotting the magnetic field lines by using a small compass needle.
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Can two magnetic field lines intersect each other? Give reason to your answer.
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In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
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In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
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Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earth's magnetic field alone.
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Draw the pattern of magnetic field lines near a bar magnet placed with its North Pole pointing towards the geographic North. Indicate the position of neutral points by marking X.
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State whether the magnetic field lines in part (a) represent a uniform magnetic field or non-uniform magnetic field?
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Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
Insert two magnetic field lines on either side of the magnet using arrow head to show the direction of each field line.
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Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
Indicate by crosses, the likely positions of the neutral points.
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Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
What is the magnitude of the magnetic field at each neutral point? Give a reason for your answer.
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What conclusion is drawn regarding the magnetic field at a point if a compass needle at that point rests in any direction? Give reason for your answer.
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Complete the following sentence :
If the field lines in a magnetic field are parallel and equidistant, the magnetic field is __________ .
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In a uniform magnetic field, the field lines are:
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