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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
You are given a magnet. How will you use it to find north-south direction at a place?
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.
Whenever a magnet is not in use, it should be stored along with other magnets.
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?
Write the answer in your word.
What are the practical uses of a magnet?
Select the correct option:
The substance which form a strong temporary magnet is:
What are magnetic keepers? What are they used for?
What is a natural magnet?
What will happen when we place magnets near cell phones, computers, and DVDs?
Give the uses of magnets in everyday life.
