Beginner
4 lessons
109 min
Electrical Fundamentals
Start from the physical meaning of electric charge and build the core quantities, Ohm’s law, complete circuit paths and safe measurement habits. Every later course in the hub assumes the ideas introduced here.
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What you will learn
- Define electric charge, current, voltage and resistance with their units
- Apply Ohm’s law to simple DC circuits and check the result with units
- Recognise a complete circuit, an open circuit and a short circuit
- Choose the correct meter mode and connection for a basic measurement
- Explain why low-voltage circuits can still create fire and shock hazards
Prerequisites. No previous electrical training required · Comfort with basic arithmetic and simple fractions · Willingness to follow safety instructions before touching any circuit
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Course lessons
1
What Is Electricity?
Charge, current and potential difference explained from the movement of charge carriers, with the first two fo...
25 min →
2
Voltage, Current and Resistance
The three quantities that describe a linear circuit, Ohm’s law in its three forms, and the effect of temperatu...
30 min →
3
Conductors, Insulators and Complete Circuits
How materials guide or block current, how resistance depends on length and cross-section, and the difference b...
28 min →
4
Electrical Safety Basics
How current affects the body, why isolation and proven de-energisation come first, and the habits that prevent...
26 min →