Electromagnetism

Question	Answer
Bar Magnets	Are permanent magnets, which means that there magnetism is there all the time. These magnets have a north pole and a south pole.
North and South Poles	North Poles are attracted to South Poles South Poles will repel South Poles North Poles will repel North Poles
Ferromagnetic	Materials that can be magnetized and are attracted to magnets.
Magnetic Domains	Are regions within a ferromagnetic material that have a north pole and a south pole. In non-magnetized objects these are arranged randomly which cause the effect to cancel out. A magnetized object has it domains aligned.
Magnetic Fields	Flow from the north pole to the south pole
Current and Magnetism	Current creates a magnetic field
Right Hand Grip rule	Direction of current = thumb Direction of magnetic field = fingers
Magnetic Field Strength Equation	B = (K I) / d B - magnetic field strength (Tesla, T) I - current (amps, A) d - distance (metres, m) K - 2 x 10^-10 Tm/A
Solenoid	Is a long wire winded into a coil and sometimes has an iron core. These produce a strong magnetic field and are typically used in electrical circuits due to their electromagnetic properties.
Right Hand Grip Rule for Solenoids	Direction of Field/North = thumb Direction of current = fingers

Resource summary

	Created by Brooke Clark over 8 years ago