Download Basic electronics

Electronics

Electronics is based on the flow of
electrons from one point to another in a
circuit.

A Circuit is a loop of a conductor that
permits electrons to flow around like
racecars on a racetrack.
Electricity

Even though electricity is one
phenomenon, we must look at 3 factors
to determine the power being used
1.) Resistance

What is trying to slow or stop the
electron/race car

Unit of measurement is called Ohms
and is represented by the Ω
2.) Voltage

What is making the electron/race car
move around the circuit

Unit of measurement is voltage and is
represented by a V
3.) Current

The number of electrons/race cars per
unit of time moving along the circuit.

The unit of measure is amperage
(amps) and is represented by amps or A
Ohm’s law
Shows the relation between all 3
Voltage ÷ Current = Resistance
 Voltage ÷ Resistance = Current
 Current ×Resistance = Voltage

Example: 9 V applied to a 4.5 Ω light
bulb will equal how man amps of current
flowing through the light bulb?

Electricity water analogy

Electricity can be compared to water
flow. Examples river, pressure washer
Work together as a group to support or
refute this statement. Explain and give
examples of what would be the
Resistance, Current, Electron, Voltage in
the water flow example.
High Current low Voltage
Low Current High Voltage
Watts the Unit of Power

Watts = Current × Voltage
So although the river has less voltage it
may still have the same amount of
power as the pressure washer.
Imagine a watermill spinning on the river
and another by the water pressure.