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What are the two poles of a magnet called?
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The two poles of a magnet are called North (N) and South (S).
What is a magnetic field and how is it visually represented?
A magnetic field is the region where a magnetic material experiences a force, represented by field lines which run from North to South.
What effect does Earth's magnetic field have on compass needles?
Compass needles align with Earth's magnetic field due to its inner core acting like a giant magnet.
What role does DC current play in magnetizing materials?
A direct current (DC) passed through a coil can strongly magnetize materials.
Describe the interaction between like and unlike magnetic poles.
Unlike poles attract each other, while like poles repel each other.
Which substance is commonly used for making permanent magnets?
Steel is commonly used for making permanent magnets.
What magnetic phenomena occur around two magnets with opposite poles near each other?
Two magnets with opposite poles near each other create a uniform field.
Where are magnetic forces strongest on a magnet?
Magnetic forces are strongest at the poles of a magnet.
Describe the stroking method of magnetization.
In the stroking method, steel is stroked with a magnet to induce magnetism.
How can you identify if a material is magnetic, non-magnetic, or itself a magnet?
Attraction indicates magnetic material, repulsion indicates a magnet, and no effect indicates a non-magnetic material.
What are the fundamental components of magnetic materials?
Magnetic materials contain iron, nickel, or cobalt.
How can you demagnetize a magnet using alternating current (AC)?
Passing an alternating current through or around a magnet can demagnetize it by disrupting its magnetic alignment.
What is the main characteristic difference between hard and soft magnetic materials?
Hard magnetic materials are difficult to magnetize but retain magnetism, whereas soft magnetic materials are easily magnetized and demagnetized.
Which materials are considered non-magnetic and why?
Non-magnetic materials, including all metals not containing iron, nickel, or cobalt, and all non-metals, are neither attracted nor repelled by magnets and cannot be magnetized.
What indicates the strength of a magnetic field on a field line diagram?
In a field line diagram, close lines indicate strong fields, while spaced lines indicate weak fields.
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