Electric Charges
Circuits
Magnetic Fields
Electromagnetism
Units & Quantities
100
the charge of an electron
negative
100
These are the 3 things (components) that a circuit needs
power (voltage) source, electrical conductors, resistor
100
The magnets below will ____________. (Explain what they will do and why)
attract, because opposite poles attract
100
An electromagnet is a temporary magnet caused by running this through a solenoid, usually around something metal.
electric current
100
The unit to measure Voltage / Electric Potential
Volts
200
the charge of a proton
positive
200
This is the direction of conventional current
from positive to negative
200
This is what causes magnetism
motion of electric charges (electrons in each atom spinning in the same direction)
200
This is how you can reverse the poles of an electromagnet
Change the direction of the current
200
A unit to measure Energy
Joules (J) or kiloWatt-hours (kWh)
300
This is how an object can become negatively charged
gain electrons
300
This type of circuit has multiple paths that current can flow through
parallel circuit
300
Magnetic Field lines show us these 2 things
the strength and direction of the magnetic force
300
This is the name of the process of producing an electric current by moving a magnetic field near a loop of wire
Electromagnetic induction
300
The unit to measure Current
Amperes (Amps) (A)
400
this is how an object can become positively charged
lose electrons
400
The amount of current that will flow through a circuit connected to a 12V battery with three (3) lightbulbs each with a resistance of 1 Omega (Must include correct units!)
Ohm's Law: I = V/R
I = 12/ (1 + 1 + 1)
I = 12/3 = 4 Amps
400
This is the reason the Earth has a magnetic field around it
liquid metal inside the earth creates an electric current that causes a magnetic field
400
These 3 things can affect the amount of current produced by a moving magnetic field
speed, strength of the magnet, number of coils
400
The unit to measure Resistance
Ohms ( Omega )
500
According to Coulomb's Law, these are the 2 things that affect the strength of an Electric Force
amount of charge and distance between charges
500
You connect an ammeter to a simple series circuit powered by the hand crank generator with a 10 Omega resistor and find that the current is 2A. You are supplying this much voltage to the circuit with the hand-crank generator.
Ohm's Law:
V = IxR
V = 2x10
V = 20V
500
These are the 2 ways to make an electromagnet stronger.
Increase the number of coils (length of the solenoid) or increase the current (by adding more voltage / batteries)
500
These 2 devices use electromagnetic induction to help bring electricity into our homes
electric generator (creates the electric current), electric transformer (changes the voltage)
500
The unit to measure Charge
Coulombs (C)