2.
Ohm’s Law
Quiz
Voltage
Example
Current
Circuit
Resistance
Resistor
3.
What is ohms law?
Ohm’s Law explains the
relationship between voltage (V
or E), current (I) and resistance (R)
Used by electricians, automotive
technicians, stereo installers
4.
CURRENT
Current refers to the
quantity/volume of electrical flow.
Measured in Amps (A)
5.
VOLTAGE (V)
It is the push or pressure behind
current flow through a circuit, and
is measured in (V) volts.
6.
RESISTANCE
Resistance to the flow of the
current. Measured in Ohms
8.
General Rule.
1. Assuming the resistance does not change:
As voltage increases, current increases.
As voltage decreases, current decreases.
2. Assuming the voltage does not change:
As resistance increases, current decreases.
As resistance decreases, current increases.
11.
How do calculate?
Battery voltage is 12V
Current is Amp ?
Resistance 2 Ohm
12.
How to calculate?
Voltage is 12V
Current is 4 Amps
Resistance Ohms ?
13.
What can we use to measure?
Multi meters/ DVOM
14.
Resistors
Why do we need resistors
To decrease the amount of voltage
applied to a component
The value of the resistor is marked on the
body using coloured rings
25.
QUIZ
What is Voltage?
What is Current?
What is Resistance?
What are wiring diagrams?
What are the different circuits
and there characteristics?
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