Electronics Tutorial #4 - Ohm's Law Pt 1 - Relationship between Current, Voltage and Resistance

Описание: A tutorial on George Ohm's law for basic electronics and the relationship between current, voltage and resistance.
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Ohm's law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change. Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed. The formula can be manipulated so that the relationship can easily be seen for all of the three variables.

In this video:

I use some analogies to explain Ohm's Law and what resistance is and how it affects current and voltage.
I go through some theoretical examples and then demonstrate these in circuits.
I show how the theory sometimes does not reflect what happens in practice.
I introduce some examples I will go through as a practical application of Ohm's law: current shunt, voltage divider, resistor values for LED, Arduino voltmeter.
I demonstrate my Texas Instruments TI-30XS Multiview Calculator which can make calculating formulas a little easier.
How to work out resistance in series and parallel?
How to work out current in a circuit?
What is voltage / volt drop?
What is a resistor?

Electronics 101 - Ohm's Law:
http://www.electronicstheory.com/html...

Topics for future videos in this series:

Ohms law, resistance, power, energy
Electronic components - diodes, transistors, FETS, capacitors, digital logic gates, integrated circuits, 555 timer.
Series and parallel circuits
Op amps and feedback