Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 8
Current Electricity
You switch on a light, and the room is bright at once. A heater warms the room, and a phone charger fills a battery. All of them use electric current. In this chapter we find out what current is, what pushes it through a wire, and what makes a wire resist it. We join resistors in series and in parallel, we measure the heat that a current makes, and we learn how to find the power and the cost of an appliance. Python helps us calculate and draw.
3 courses
Chapter 9
Magnetic Effects of Current, Electromagnetic Induction, Current Electricity
A compass needle moves when you bring a wire with a current near it. A crane lifts a car with a magnet that you can switch off. A fan turns, and a power station makes electricity, with the same two ideas: a current has a magnetic field, and a magnet and a coil can make a current. In this chapter we study the field of a current, the force that a field makes on a current, the electric motor, the generator, and the safe wiring of a house. Python helps us calculate and draw.
3 courses
Chapter 17
Current Electricity
A battery, a wire and a bulb. A few rules tell you what every part of a circuit does. In this chapter you learn how current, voltage and resistance fit together. You join resistors one after another (in series) and side by side (in parallel). You also solve circuits that have more than one battery. Python checks your work.
1 course