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Magnetism. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceMagnetism.7 Marks
Question
List out the uses of magnets.
✓

Answer

  1. In ancient times, the magnet in the form of ‘direction stone’ helped seamen to find the directions during a voyage.
  2. Nowadays, magnets are used to generate electricity in dynamos.
  3. Electromagnets are used in our day-to-day life.
  4. They are used in electric bells and electric motors.
  5. They are used in loudspeakers and microphones.
  6. An extremely powerful electromagnet is used in the fast-moving Maglev train to remain floating above the tracks.
  7. In industries, magnetic conveyor belts are used to sort out magnetic substances from scraps mixed with non-magnetic substances.
  8. Magnets are used in computers in their storing devices such as hard disks.
  9. In banks, the magnets enable the computers to read the MICR numbers printed on a cheque.
  10. The tip of the screw drivers is made slightly magnetic so that the screws remain attached to the tip.
  11. At hospitals, extremely strong electro magnets are used in the MRI (Magnetic Resonance Imaging) to scan the specified internal organ.

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