1
Like atoms, normal everyday objects have a ________ charge.
Neutral
What are three good insulators?
Glass, plastic, and wood
What is needed to make an electric cell?
Two metals and an electrolyte
What is a magnet?
Any material that has the ability to attract iron
How does a magnet produce electricty?
What is often produced when rubbing two objects together?
Static electricity
Why are electric wires often covered in plastic?
The plastic acts as an insulator and protects from electric shocks
What is an electrolyte?
A liquid or paste substance that can conduct electricity
How many poles does a magnet have and what are they called?
Two; North and South poles
What is an electromagnet?
a coil of wire attached to a core that is also attached to a power source
What is a circuit?
a continuous unbroken path for electricity to pass through
What are the electrical units of measurement?
Watts, amperes, and volts
What are two disadvantages of wet-cell batteries?
They must remain standing or upright to avoid spilling the liquid and that the liquid inside can be poisonous or corrosive.
What is the magnetic field of a magnet?
The area of magnetic force, or the area where a magnet can attract an object
What is a semiconductor?
A material that can act as either a conductor or as an insulator.
How can an electric current be turned off without removing the power source?
By using the switch
What is the mathematical relationship between the three units of electrical measurement?
HINT: think math equation or formula
Watts/Volts = Amperes
What are the two advantages of dry-cell batteries?
They can be used in any position (standing or not standing) and are sealed to avoid spilling the contents of the battery.
What do magnets and static electricity have in common?
They can both attract and repel things
How many components can a single microchip have?
What is the difference between a conductor and a resistor?
Conductors allow for the easier flow of electrons while resistors allow for the flow of electrons but at a reduced rate.
What does each electrical unit of measurement represent?
Volt: measures electrical force in a circuit
Watt: measure of electrical power
Ampere: how much current is flowing through a given part of a circuit
How does an electric cell produce an electric current?
The chemical reaction between the two metals and the electrolyte allows for electrons to travel inside the electric cell.
What is the relationship between electricity and magnetism?
One can produce the other and vice versa
What is the difference between the THREE integrated circuits of a computer?
CPU: the brain of the computer
RAM: temporary storage
ROM: Long-term memory/storage