Vocabulary
What term is best defined as "A measure of the energy for an amount of charge"?
Voltage
What will the north poles of two bar magnets do when brought together?
Repel
As more devices are added to a series circuit what happens to the current?
It decreases
Which type of circuit allows more than one bulb to light up brightly?
Parallel circuit
What unit of electrical energy is sold by electric companies?
kilowatt-hour
What is the flow of charged particles called?
An electric current
What do two opposite poles of magnets do when they are brought together?
attract
What surrounds electric charges that cause them to affect each other though they are not touching?
An electric field
What is a series circuit?
A closed circuit in which all parts are connected end to end to provide a single path for the current.
How much power does the average hair dryer use?
1,200 W
What is a resistor?
An electric device that can control the current in a circuit.
Why does the needle of a compass point to magnetic north?
The compass needle aligns itself with Earths magnetic field.
Batteries produce ___________
generators make ___________
dc, ac
What energy did the lemon provide in the experiment?
Chemical energy
How many poles do all magnets have?
Two
An electrical device that can control the flow of current in an electrical current is called:
A resistor
When a current-carrying wire is wrapped around an iron core, what can it create?
A magnet
The output energy of a generator:
Is less than the input energy
What do you predict would happen if you connected the two lemon batteries in a parallel circuit rather than in a series circuit?
It'll provide an equal amount of energy
What energy transformation occurs in an electric generator?
Electrical to kinetic
What is electromagnetism?
The relationship between magnetism and electricity.
What can iron fillings be used to show?
Magnetic field
In a dry-cell battery, current goes:
From the negative terminal to the positive one.
How do you know an electric current has more energy with a compass galvanometer made in class?
If the needle of the compass moved more, that current has a greater amount of voltage.
In a parallel circuit, all devices receive the same:
voltage