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07. Magnetism

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Answer in one line

Prepared by: learnloophq@gmail.com
Last edited 26 days ago by Learn LoopHQ.

Chapter: 07. Magnetism

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Answer in One Line

What is the property of attracting iron and other materials called?
The property of attracting iron and other materials like steel, cobalt, and nickel is called magnetism.
Name one example of a natural magnet.
One example of a natural magnet is magnetite, which is an iron ore also known as lodestone.
List two common shapes of artificial magnets.
Two common shapes of artificial magnets are the bar magnet and the horseshoe magnet.
Give two examples of non-magnetic substances.
Two examples of non-magnetic substances are paper and wood, as they are not attracted by magnets.
Where is the magnetic force always maximum on a magnet?
The magnetic force is always maximum at the two ends of a magnet, which are known as its poles.
In which direction does a freely suspended magnet always align itself?
A freely suspended magnet always aligns itself in the geographic north-south direction.
What happens when the north pole of one magnet is brought near the north pole of another magnet?
When the north pole of one magnet is brought near the north pole of another magnet, they will repel each other, pushing away.
Why is repulsion considered the surest test of magnetism?
Repulsion is considered the surest test of magnetism because only a magnet will repel another magnet’s like pole, whereas attraction can occur between unlike poles or between a magnet and a non-magnetic material.
What are the imaginary curved lines representing a magnetic field called?
The imaginary curved lines representing the magnetic field around a magnet are called magnetic lines of force.
Do magnetic lines of force intersect each other?
No, magnetic lines of force never intersect each other because they repel each other.
What is the location of Earth’s magnetic north pole relative to its geographic poles?
The Earth’s magnetic north pole is located near the geographic south pole.
How do animals like migratory birds utilize Earth’s magnetism?
Animals like migratory birds utilize Earth’s magnetism as an internal compass for navigation during their long journeys.
What is the process called when a magnetic material temporarily or permanently gains magnetic properties?
The process by which a magnetic material attains magnetism temporarily or permanently is called magnetisation.
What is the double touch method of magnetisation?
The double touch method is a way of magnetising a magnetic material by rubbing two bar magnets of equal strength against it, moving them from the center outwards repeatedly.
What material is typically used for the core of a temporary electromagnet?
A soft-iron piece is typically used for the core of a temporary electromagnet.
How can an electromagnet be made into a permanent magnet?
An electromagnet can be made a permanent magnet if a piece of steel is used as the core instead of soft iron.
List three different uses of magnets in daily life.
Magnets are used in magnetic compasses for finding directions, in refrigerator doors for sealing, and in dynamos for generating electricity.
What is the primary difference in material between a permanent magnet and a temporary magnet?
A primary difference is that permanent magnets are usually made of steel, while temporary magnets are typically made of soft iron.
Name one action that can cause a magnet to lose its magnetic properties besides heating or hammering.
One action that can cause a magnet to lose its magnetic properties is dropping it frequently.
What are the soft iron pieces called that are used to store magnets?
The soft iron pieces used to store magnets are called magnetic keepers.
Who was William Gilbert, and what significant discovery did he make regarding Earth’s magnetism?
William Gilbert was an English physician and physicist who discovered that the Earth itself acts as a giant magnet, which explains why a freely suspended magnet always aligns itself in the north-south direction.
When making a magnetic compass by floating a magnetised needle in water, what important precaution should be taken with the cork?
When making a magnetic compass, the cork with the magnetised needle should be placed gently and centrally in the water tub to ensure it floats freely without obstruction.
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