quick presentation on the basics of eletricity

2. WHAT IS ELECTRICITY?
• Definition: Electricity is the set of physical phenomena associated with
the presence and flow of electric charge.
• This means electricity is the flow of electrons.
• Electricity is also a form of energy.
• When an atom loses an electron, the free movement of these electrons
constitutes an electric current.

3. HOW DOES ELECTRICITY WORK?
When enough electrical energy is added to the electrons-after flipping on a
switch, for example, they can escape from their normal orbit and flow along
a path.

4. WHAT IS AN ELECTRICAL CURRENT?
• Electrical current is the movement or flow of electrically charged
particles.
• The SI unit for measuring the rate of flow of electric charge is the
ampere, which is charge flowing through some surface at the rate of
one coulomb per second.
• Electric current is measured using an ammeter.

5. WHAT IS POTENTIAL DIFFERENCE?
• Potential difference, or voltage between two ends of a path, is the total
energy required to move a small electric charge along that path, divided
by the magnitude of the charge.
• It is denoted ∆V and measured in units of electric potential: in volts, or
joules per coulomb
• A voltmeter can be used to measure the voltage (or potential difference)
between two points in a system.

6. WHAT IS RESISTANCE?