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प्रश्न
List out the uses of magnets.
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
Select the correct answer
An example of natural magnet is
Fill in the blank.
Magnetic poles always exist in ...............
State if the following statement is true or false. Correct the statement if it is false.
Attraction is the surest test for magnetism.
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?
Draw the magnetic flux pattern near a bar magnet placed with its axis in the magnetic meridian and the south pole pointing towards geographic north.
The south pole of a bar magnet and the north pole of a U-shaped magnet will _______.
Which is not attracted by a magnet?
The pole of a freely suspended magnet that points towards the north is called the south pole and what points towards the south is the celled north pole.
Give the uses of magnets in everyday life.
