Tobi Technology

What is a Hazard ?

A hazard is anything with the potential to cause harm.

What is Risk ?

The likelihood that a harzard will cause a specified harm to someone.

What is Harm ?

harm to someone

OR
damage to something.

What are Electrical components ?

An electrical component is a basic part in a circuit that uses electricity to make something happen.

LED

LEDs (Light Emitting Diodes) are small energy efficient light sources that emit light when electricity flows through them.

Microprocessor

A Microprocessor is a computer chip that can be programmed .

Transistors

A transistor is an Electronic Switch .

Resistor

A resistor slows or stops the flow of current .

Slide Switch

A resistor slows or stops the flow of current .

What is Current

Current is the flow of electrons. .


Current is measured in Amps (A)

What is Voltage

Voltage is the force that makes electrons flow.

Voltage is measured in Volts (V)

What is Resistance

When a material resists the flow of electrons.

Resistance is measured in ohms(Ω).

Ohms Law

We usually write Ohm's Law as :

V = I x R


V : is Voltage (V)
I : is Current
R : is Resistance

Ohms Law Formulas

Calculations :

V = I x R

I = V ÷ R

R = V ÷ I

Ohms Law Examples

​What is the Current flowing thru
this circuit ?


I = V / R

Ohms Law Examples

​What is the Resistance of
this circuit ?


R = V / I