Electromagnetic Induction and Household Circuits

Name: Electromagnetic Induction and Household Circuits
Author: StemPy Lab

A power station makes electricity by turning a coil in a magnetic field. In this course we find how a moving magnet makes a current in a coil, we study the generator and the alternating current that it gives, and we learn how the wiring of a house is made, and how it is kept safe.

3 lessons, about 1 h 20 min3 simulations12 problems6 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 25 min
Electromagnetic induction
When the magnetic field through a coil changes, for example when a magnet moves into the coil or out of it, a current flows in the coil. This is electromagnetic induction. The induced current is larger when the magnet moves faster, when the field is stronger and when the coil has more turns. Fleming's right-hand rule gives its direction.
1 simulation2 practice questions1 Python program4 problems
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Lesson 2about 25 min
The electric generator and alternating current
An electric generator changes mechanical energy into electrical energy. When a coil is turned in a magnetic field, a current is induced in it. In an AC generator, two slip rings keep the connection to the outside circuit, and the current changes direction after every half turn. The alternating current of the mains changes direction 100 times in a second, at a frequency of 50 hertz. A split ring gives a direct current that always has one direction.
1 simulation2 practice questions1 Python program4 problems1 Python lab1 question set
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Lesson 3about 30 min
Household electric circuits and safety
The supply of a house comes by three wires: the live wire, the neutral wire and the earth wire. The appliances are joined in parallel, in separate circuits for small and large currents, each with a fuse. A short circuit and overloading cause a large current, and the fuse melts. The earth wire joins the metal body of an appliance to the ground, so that a fault does not give a shock.
1 simulation2 practice questions1 Python program4 problems1 Python lab1 note
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Magnetic Effects: Chapter Test

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Electromagnetic Induction and Household Circuits

Course outline (3 lessons)

Electromagnetic induction

The electric generator and alternating current

Household electric circuits and safety

Test Your Learning

Your teacher

Discussion (0)