6.7.1.2 magnetic fields Flashcards
Electromagnetic effects are used in a wide variety of devices. Engineers make use of the fact that a magnet moving in a coil can produce..
Electrical currents and also that when current flows around a magnet it can produce movement
The electrical current and movement produced by electromagnetism means that systems..
That involve control or communications can take full advantage of this.
What is the magnetic field of a magnet
The region around a magnet where a force acts on another magnet or on a magnetic material
Name the 4 magnetic materials
Iron, steel, cobalt and nickel
What is the force between a magnet and a magnetic material always on of
Always one of the attractions
What does the strength of the magnetic field depend on
The distance from the magnet.
Where is the magnetic field strongest
At the poles of the magnet
The direction of the magnetic field at any point is given by the direction..
Of the force that would act on another North Pole placed at that point
What is the direction of a magnetic field line
From north (seeking) pole of a magnet to the south (seeking) pole of the magnet.
A magnetic compass contains a what?
A small bar magnet
Does the Earth have have a magnetic field or not
Yes, the Earth has a magnetic field
The compass needle points in the..
Direction of the Earth’s magnetic field
