How electricity works — charge, voltage, current, and resistance and how they relate; Ohm’s law and electrical power (P = IV); series vs parallel circuits and how to solve for the unknowns; the core components (resistors, capacitors, inductors, diodes, transistors) and what each does; AC vs DC, magnetism and electromagnetic induction; and the safety fundamentals (grounding, fuses, why a short circuit is dangerous). Many questions have a computed, always-correct answer, and every explanation names the classic mix-up (voltage vs current, series vs parallel, power vs energy) and leaves a rule. Foundational for physics, electronics hobbyists, and the electrical trades.
• Meets you at your level — never too easy, never too hard.
• Adapts every question to how you’re doing.
• Tracks your level over time. Skill practice, not a test.
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