Fields
Magnetic fields are made by __________ charges.
Moving
What particles travel through wires to make an electric current?
Electrons
Kilowatt-hours are a unit of....
Energy
This device converts motion into electricity.
Generator
What are the two types of circuits you can build to connect multiple light bulbs?
Series and parallel
What word describes how much a magnetic field is changing?
Flux
Write the equation for Ohm's Law
I=V/R
V=IR
What is the unit for power?
Watts or Kilowatts
Name the scientist who linked electricity and magnetism.
Faraday
What is it called when lots of current travels through a circuit with little to no resistance?
Short circuit
Where is the north magnetic pole of the Earth?
Near (not at) the south geographic pole
Write out what AC and DC stand for.
Alternating Current, Direct current
An oven draws a current of 10 A when plugged into a 120V circuit. What is the power in kilowatts of the oven?
1.2 kW
Fill in the blanks: A ___________ magnetic field induces an electric ___________.
Changing, current
This is the amount of current that will kill you if it runs through your body.
(Minimum amount)
0.07 - 0.2 Amps
Name two ferromagnetic materials.
Iron, nickel, cobalt, magnetite, neodymium
Calculate the current of a 900 Ω lamp hooked up to a 9-Volt battery.
0.01 A
A light bulb uses 2 A of current when plugged into a 120 V outlet. If it is run for 10 hours, how many kWh of energy is used?
240 W --> 0.24 kW x 10 hours
2.4 kWh
A device that lowers the voltage of a circuit is called....
Step-down transformer
Electron spins
List the correct units of Voltage, Current, and Resistance.
Volts (V), Amperes (A), Ohms (Ω)
1kW x 0.25 hr = 0.25 kWh
The electromagnetic induction of a paramagnetic material moving within a magnetic field that causes a slowing effect is called...
Eddy currents
In three-pronged plugs, the third wire is called the ________ wire.
Ground / grounding