electromagnetism 1
3 types of electric charges
positive charge, negative charge, neutral charge
Opposite poles of magnets __________
attract
Like poles of a magnet _________
repel
Compasses point
north
A coil of wire acting as a magnet when carrying electric current
solenoid
The device used to measure electric currents-
ammeter
The area around a magnet where the force is exerted
magnetic field
A magnet will pick up an object that is made of:
A. plastic
B. iron
C. copper
B. iron
Process of generating electric current with a changing magnetic field is called
electromagnetic induction
Name a way to increase the strength of an electromagnet
number of coil wrappings, using a larger iron core
True of False: All metals stick to magnets
When a current flow through a wire, this is produced
magnetic field
Advantage of using an electromagnet
ability to turn it on and off
These are groups of atoms which have aligned themselves to all face in the same direction
domains
To construct an electromagnet you need an iron core, a power source, and ____
wire
What is the piece of iron called that is wrapped around by a solenoid?
solenoid's core
2 types of electricity
static electricity & current electricity
Magnetism produced by electric current is known as ______________
electromagnetism
When a wire is exposed to a changing magnetic field, this is produced
electric current