charged by friction, induction, or conduction
Styrofoam rubbing with paper
this is charged with friction!
The opposition presented to the current by a material or device. Measured in ohms.
Resistance
what type of circuits are not complete?
open circuits
Which poles attract?
Opposite poles attract.
____ fields generate magnetic fields and vise versa.
electric
heating a pan on the stove
conduction
Alternating current
what controls the flow of electrical current in a circuit?
a switch
What is a magnetic pole?
One of two points, such as the ends of a magnet, which have opposing magnetic qualities.
ac or dc: current moves in one direction
DC
pulling clothes out of dryer and they stick together
friction
A coil of wire with an electric current running through it; does not have a magnetic core.
electricians show pics of circuits by drawing ____?
schematic diagrams
What type of poles does earth have?
two ways to increase the strength of an electromagnets magnetic field
number of coils increase, and the voltage increases
a positively charged aluminum plate is touched to a neutral metal sphere.
conduction
An instrument that detects, measure, and determines the direction of a small electric current.
Galvanometer
series or parallel: current is divided across branches
Whats the strongest fundamental force?
Strong nuclear force
ac or dc: current moves in one direction
DC
buildup of dust on the screen of a television
induction- the television being turned on starts to build up a charge
A type of circuit where everything is connected on 1 branch.
Series circuit
series or parallel- more resistors, less resistance
parallel
What is the region where earth's magnetic fields are located?
Magnetosphere
what is an electromagnet?
A coil that has a magnetic core and that acts as a magnet when an electric current runs through the coil.