Electrical Systems

Series and parallel circuits, components

Electrical Circuits and Components

Electrical systems use circuits to power devices. Series circuits have one path for current (if one component breaks, all stop). Parallel circuits have multiple paths (components work independently). Circuit diagrams use symbols to represent components: battery, switch, bulb, resistor, motor.

Example

Series vs Parallel

Series: Battery → Switch → Bulb 1 → Bulb 2 → back to battery • One path for current • Break anywhere = whole circuit stops • Bulbs are dim (share voltage) Parallel: Each bulb has its own path from battery and back • Multiple paths for current • One bulb can break without affecting others • Each bulb gets full voltage (bright) House wiring uses PARALLEL circuits

Note

Remember

NEVER experiment with mains electricity (220V) — it can kill! Use batteries (safe, low voltage) for experiments. Draw circuit diagrams using correct symbols. Switches control the flow of current. Fuses and circuit breakers protect against overloading (too much current).

Key Vocabulary

Series circuitA circuit with only one path for electric current

Parallel circuitA circuit with multiple paths for electric current

ComponentA part in an electrical circuit (battery, switch, bulb)

Circuit diagramA drawing using symbols to show an electrical circuit

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Series circuit

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