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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.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
The surest test of magnetism is
How will you do this?
Determine whether a material is magnetic or non-magnetic.
If a bar magnet is hung by a thread tied at its center, its north pole becomes steady in the direction of the ______ Pole of the earth.
There is repulsion between the _____ poles of a magnet and attraction between its _____ poles.
Select the correct option:
The substance which form a strong temporary magnet is:
Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic, north.
Give scientific reason:
Two steel needles hanging from the lower end of a vertical bar magnet do not hang vertically.
Give scientific reason:
Not attraction but repulsion is a sure test of magnetism.
Give the uses of magnets in everyday life.
