Science Class 10
Electricity
Measure current and voltage, use Ohm's law, and read your electricity bill.
11 lessons · ~78 min total
Track progress — 0 of 11 lessons read 0%
Lessons in this topic
- 0 Start here Current, voltage, resistance, and the rule that ties them together. · 3 min You are here
- 1 Charge on the move Current is the charge passing a point each second. · 7 min
- 2 Measuring a circuit An ammeter sits in the path and reads the flow. A voltmeter sits across a part and reads the push. · 7 min
- 3 The rule that connects them At a fixed temperature, more push gives more current, in proportion. This is Ohm's law. · 8 min
- 4 What resistance depends on A longer wire raises resistance. A thicker wire lowers it. The material matters too. · 8 min
- 5 Two ways to wire a lamp Series adds resistances on one path. Parallel gives each resistor its own path, so the total falls. · 9 min
- 6 Where the energy goes A current heats a wire. The heat is current squared times resistance times time. · 8 min
- 7 Power and its rate Power is voltage times current. It also equals current squared times resistance. · 8 min
- 8 What the meter counts The meter counts energy: power times time. One unit is one kilowatt-hour. · 8 min
- 9 The big picture Eight ideas about current, voltage, resistance, power and the electricity bill. · 4 min
- 10 Track quiz The eight rules first. Then nine questions on the whole chapter. · 8 min
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