Electricity Basics
What is all matter made up of?
Atoms?
Where can electricity be stored?
In a battery
Rubbing two objects together creates _________ electricity.
Static electricity
What are the four main groups of components used in an electrical circuit?
Power source, conductor, load devices, and control devices
What are the three main electrical variables?
Voltage, Intensity, Resistance
Electricity is created when __________ jump from one atom to another atom.
Electrons
What do we call a material that allows electricity to flow through it?
A conductor
Similar charges attract or repel?
Repel
What does the power source do? Give two examples.
They provide the electrical
energy necessary to start the
movement of the electrons. Examples include a battery or a cell
What is Intensity and what is the unit of measurement?
Intensity is the current or the amount of electrons flowing through a wire over a certain time. The unit of measurement is Amperes
What is the flow of electrons is called?
Electric current
What do we call a material that does not allow electricity to flow through it?
An insulator
Opposite charges attract or repel?
Attract
What do conductors do? What is the most common material used?
They transport the electrical energy from the
power source to the load devices. The most common material used is copper.
What is Voltage and what is the unit of measurement?
It is difference in the charge between two points (positive terminal and negative terminal) which makes the electrons move. The unit of measurement is Volts
Electricity can be turned into what other types of energy?
Light, heat, sound and movement
Which type of circuit only has one possible path for the electric current to flow through?
Series circuit
If there are more electrons than protons, is there a negative or positive charge?
Negative charge
What do the load devices do? Give two examples.
They receive the electrical energy from the
power source and convert it to other types
of useful energy. Examples include a light bulb and a motor
What is Resistance and what is the unit of measurement?
It is the opposition to the flow of the electric current. The unit of measurement is Ohms
What are the names of the three parts of an atom, and what are their charges?
protons (+), electrons (-), and neutrons (no charge)
Which type of circuit has several possible paths for the electric current to flow through?
Parallel circuit
If there are more protons than electrons, is there a positive or negative charge?
A positive charge
What do control devices do? Give two examples.
They regulate the circuit allowing or preventing the flow of electric current through the circuit. Examples include a switch and a push button
What is the formula for Ohms Law?
V=I·R