Learn

Awesome work! We’ve covered a lot regarding electricity and electronics! Let’s recap what we’ve learned so far:

• Electronic circuits consist of 3 basic elements: An electric source, a load, and a conductive path
• Voltage is measured in volts (V) and is defined as the amount of electric potential energy between two points
• Current is measured in amps (A) and it’s the measurement of the flow of electricity through a circuit
• Resistance is measured in ohms (Ω) and is the measure of the opposition to current flow in an electric circuit
• Schematics are diagrams used to represent a circuit.
• Some schematic symbols include, a voltage source, push-button, resistor, and an LED
• Ohm’s Law, V = I × R, is a fundamental rule of electronics that represents the relationship between voltage, current, and resistance
• LEDs are used as circuit indicators and allow current to only flow in one direction
• Forward voltage is the recommended voltage to be applied by an LED with a resulting current known as the forward current

With this knowledge, you will be able to build up a better understanding of more complex concepts that have to do with electric circuits and electronics in general.

Congratulations on completing this lesson!

### Instructions

The schematic in the workspace represents many of the concepts from this lesson. Look at the circuit as a whole and then each component individually. Review the following questions and see what answers you might come up with:

• What is the source in this circuit?