⚡ Current and Voltage

What you’ll learn

1. Current: The FlowUnderstand that current is the flow of electric charge, measured in amps.An electric current is the flow of charge moving around a circuit. It tells us how much charge passes a point each second, and it is measured in amperes, or amps, with an ammeter. Picturing water in a river helps: a bigger current carries more charge past each second.
2. Voltage: The PushDefine voltage as the push that drives current, measured in volts, and tell it apart from current.Voltage is the push a battery or power supply gives to drive current round a circuit, measured in volts with a voltmeter. It is not the same as current: voltage is the push, current is the flow that results. A taller waterfall pushes harder, like a higher voltage.
3. Working TogetherExplain that a higher voltage drives a larger current, and that each is measured with its own meter.Voltage and current work together. For the same circuit, raising the voltage drives a larger current, brightening a bulb or speeding a motor. Engineers measure current with an ammeter in the loop and voltage with a voltmeter across a part.

Questions this course answers

Grounded in trusted sources

• BBC Bitesize
• The Physics Classroom
• HyperPhysics

Every Wunder lesson is built from real, reputable sources — never invented.

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