P4.1 Magnets and Magnetic fields Flashcards
At which part of a magnet are the magnetic forces
strongest?
The poles of the magnet.
What happens when two magnets are brought close
to each other?
They exert a force on each other.
What type of force is exerted if two like poles of a
magnet are brought near each other?
A repulsive, non-contact force.
What type of force is exerted if two unlike poles of a magnet are brought near each other?
An attractive, non-contact force.
What is the difference between a permanent magnet
and an induced magnet?
A permanent magnet produces its own magnetic field.
What is an induced magnet?
An induced magnet becomes magnetic when placed in a magnetic field.
What is a magnetic field?
The region surrounding a magnet where another magnet or magnetic material experiences a non-contact force.
Give four examples of magnetic materials.
- Iron
- Steel
- Cobalt
- Nickel
What is produced when current flows through a conducting wire?
A magnetic field is produced around the wire.
Describe the magnetic field produced around a current carrying wire.
Uniform rings along the whole length of wire.
What determines the strength of the magnetic field
around a current-carrying wire?
Current flowing through the wire
distance
What is a solenoid?
A coil of wire which when current passes through creates a strong magnetic field.
Describe the magnetic field found inside a solenoid
Strong and uniform.
