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प्रश्न
List out the uses of magnets.
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उत्तर
- In ancient times, the magnet in the form of ‘direction stone’ helped seamen to find the directions during a voyage.
- Nowadays, magnets are used to generate electricity in dynamos.
- Electromagnets are used in our day-to-day life.
- They are used in electric bells and electric motors.
- They are used in loudspeakers and microphones.
- An extremely powerful electromagnet is used in the fast-moving Maglev train to remain floating above the tracks.
- In industries, magnetic conveyor belts are used to sort out magnetic substances from scraps mixed with non-magnetic substances.
- Magnets are used in computers in their storing devices such as hard disks.
- In banks, the magnets enable the computers to read the MICR numbers printed on a cheque.
- The tip of the screw drivers is made slightly magnetic so that the screws remain attached to the tip.
- At hospitals, extremely strong electro magnets are used in the MRI (Magnetic Resonance Imaging) to scan the specified internal organ.
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संबंधित प्रश्न
Fill in the blank
To light a table lamp and to run a refrigerator, we use ______ as the source of electricity.
Select the correct answer
An example of natural magnet is
Answer the following in short.
If a bar magnet is placed over iron filings, where will the attraction of the iron fillings be
- maximum?
- minimum?
Define the following term regarding a bar magnet:
Effective length
A magnet remains steady in a ________ direction.
The real test of a magnet is ______.
Observe the pictures A and B given in figure carefully.
Which of the following statement is correct for the above given pictures?
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
The magnetic poles always exist in pairs.
Define the terms magnet and magnetism.
