Electromagnetism Flashcards
If there is a electrical current in a conductor, what does it produce?
A magnetic field around it
If there is a larger eletric currentt, what does it do to the magnetic field?
Magnetic field becomes stronger
How do I determine the direction of the magnetic field?
Direction of magnetic field depends on directoon of current
Is there a magnetic field around a straight, current carrying wire?
Yes
What is the magnettic field around a straight current carrying wire made up of?
Concentric circles with the wire in the centre
What is the magnetic field in the centre of a flat circular coil of wire simlar to?
Similar magnetic field to a bar magnet
Describe the magnetic field of a flat circular coil of wire
There are concentric ellipses (stretched circles) of magnetic field lines around the coil
What is the magnetic field like inside of a current-carrying solenoid?
It is strong and uniform
What is the magnetic field like outside of a current carrying solenoid?
It is like that of a bar magnet
What do the ends of a solenoid corelate to with bar magnets?
North and South pole
What is a current carrying solenoid
A Electromagnet
What does it mean if a magnetic material is considered soft?
It loses its induced magnetism quickly
What does it mean if a magnetic material is considered hard?
It keeps it’s induced magnetism permanently
Give an example of a soft and hard magnetic material
Soft: Iron
Hard: Steel
What is a use for a soft material like iron?
Iron is used in transformers as it has to magnetise and demagnetise 50 times per second
