Electrical Engineering Basics: Circuits, Power & Energy

What you'll build

What you will be able to do

Each lab ends with a concrete result that you build yourself and the checker confirms, cell by cell.

• Calculate current and power for six bench loads, find an unknown resistance from a measurement and check a resistor's power rating.
• Combine four resistors in series and in parallel, split a supply voltage across a series chain and design-check a voltage divider.
• Turn Kirchhoff's voltage law into two mesh equations and solve them with Cramer's rule to find every current in a two-source circuit.
• Turn a 230 V, 50 Hz supply into its peak value, tabulate one full period of the sine wave, chart it and check the RMS value numerically.
• Calculate the reactance of a capacitor and an inductor at 50 Hz, the impedance of two series circuits and their phase angles with ATAN2 and DEGREES.
• Split the power of five workshop machines into apparent, real and reactive power, find the overall power factor and size the reactive power a capacitor bank would need to supply.
• Turn the power ratings and running hours of Nadia's household appliances into kWh, cost each one and build her monthly bill.
• Calculate the resistance and voltage drop of six cable runs, flag the ones above an illustrative 3% limit and find the next standard cross-section for the worst 230 V run.