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प्रश्न
Which substances are used for making electromagnets?
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उत्तर
To make an electromagnet, we require the following:
- A long conducting copper wire
- An iron nail on which the copper wire has to be wound
- A switch
- A battery
संबंधित प्रश्न
Fill in the following blank with suitable words:
Magnetic field lines leave the .......... pole of a bar magnet and enter at its .......... pole.
Explain why, a freely suspended magnet always points in the north-south direction.
The magnetic field lines:
(a) intersect at right angles to one another
(b) interest at an angle 45° to each another
(c) do not cross one another
(d) cross at an angle of 60° to one anotherv
A charged particle enters at right angles into a uniform magnetic field as shown:
What should be the nature of charge on the particle if it begins to move in a direction pointing vertically our of the page due to its interaction with the magnetic field?
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?
What do you understand by the term magnetic field lines?
State four properties of magnetic field lines.
The relative strength of the magnetic field at a point in the space surrounding the magnet is shown by the ____________.
Name the poles P, Q, Rand S of the magnets in the following figures 'a' and 'b':
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| Figure 'a' | Figure 'b' |
