P7 magnetism basics/ permanent/ induced magnets Flashcards
What is a permanent magnet?
A permanent magnet is a material that produces a persistent magnetic field without the need for an external power source.
True or False: Induced magnets are always magnetic.
False: Induced magnets only become magnetic in the presence of a magnetic field.
Fill in the blank: The area around a magnet where magnetic forces can be felt is called the __________.
magnetic field
What happens to an induced magnet when the external magnetic field is removed?
It loses its magnetism and returns to being non-magnetic.
Which of the following materials can be used to make permanent magnets? A) Iron B) Plastic C) Wood
A) Iron
What is the main characteristic of the magnetic field lines around a magnet?
They flow from the north pole to the south pole.
True or False: All materials can be magnetized.
False: Only certain materials, like ferromagnetic materials, can be magnetized.
What is the effect of heating a permanent magnet?
Heating a permanent magnet can cause it to lose its magnetism.
Define ‘magnetization’.
Magnetization is the process of making a material magnetic by aligning its magnetic domains.
Multiple Choice: What is the north pole of a magnet? A) The end that attracts other magnets B) The end that repels other magnets C) The end that points towards the Earth’s North
C) The end that points towards the Earth’s North
What is the difference between a permanent magnet and an electromagnet?
A permanent magnet generates a constant magnetic field, while an electromagnet’s magnetic field can be turned on and off using electricity.
True or False: The strength of a magnetic field decreases with distance from the magnet.
True
Fill in the blank: The process of rubbing a magnet against a material to induce magnetism is called __________.
magnetization
What are the two poles of a magnet called?
North pole and South pole.
What happens when like poles of two magnets are brought together?
They repel each other.
