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प्रश्न
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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उत्तर
The iron filings take up a definite pattern (curved lines). This happens because each piece of iron filing becomes a magnet to the magnetic induction of the magnet. It thus experiences a force in the direction of magnetic field of the bar magnet at that point and aligns itself along curved lines.
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संबंधित प्रश्न
The wire in Figure below is being moved downwards through the magnetic field so as to produce induced current.
(a) moving the wire at a higher speed?
(b) moving the wire upwards rather than downwards?
(c) using a stronger magnet?
(d) holding the wire still in the magnetic field?
(e) moving the wire parallel to the magnetic field lines?
Explain the following :
When two pins are hung by their heads from the same pole of a magnet, their pointed ends moves apart.
Explain the following :
Several soft iron pins can cling, one below the other, from the pole of a magnet.
What do you understand by the term magnetic field lines?
A battery can supply a charge of 25 × 104 C. If the current is drawn from battery at the rate of 2.5 A, calculate the time in which battery will discharge completely.
How do you account for the following fact?
Soft iron keepers help to prevent the magnets from losing their magnetic properties.
Draw diagram showing the arrangement of the lines of force for a single magnet.
The magnetic field lines always begin from ____________.
State the inference drawn about the direction of the magnetic field lines on the basis of the following diagrams.
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| Figure 'a' | Figure 'b' |
