Electricity: Basic Concepts Review
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- Opposition to charge flow.
- Units: Ohms (Ω)
Current Flow Analogy
Voltage Analogy
Resistance Analogy
A simple circuit is given below, where the 3V battery causes a current through the LED, causing it to light up.
Measuring Electricity – Voltage
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In Tinkercad, you just need to click on a resistor to get the option to change its resistance. Note that color bands on the resistor will get changed accordingly!
A simple circuit to turn on an LED is shown below. It also incorporates a meter to measure current.
Now, we also incorporate the measurement of voltage across the resistor. We can verify that Ohm's law holds: 1.08V/3.26 mA = ~330 Ohm.
Prototyping Circuits : Breadboard
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