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Magnetism and Induction Review
For the test over magnetism and induction, you should know:
How will a magnet which is free to rotate, such as a compass, align itself with the earth’s magnetic field?
How do opposite poles affect each other? What about like poles?
What do you get when you break a magnet in half? Can you ever make it small enough to get just one
magnetic pole?
What is the source of magnetic fields?
What are magnetic domains?
Where is the magnetic pole in the northern hemisphere? Is it in the same place as the geographic pole?
What type of magnetic pole is it?
What is the commonly accepted theory for the source of earth’s magnetic field?
Which direction are magnetic field lines drawn? (Which way do the arrows point?)
What conditions are necessary for induction to occur?
How are the number of turns in a coil related to the induced voltage?
What does a generator consist of? How about a motor? How are they different?
What is the function of a generator? a motor?
What is a transformer?
What is the relationship between primary & secondary turns and voltages?
Ignoring energy losses due to heating of the coils, how do secondary and primary power compare? What
about energy? What about currents?
Is secondary voltage higher or lower than primary voltage in a step-up transformer?
Why do power companies transmit energy as ac rather than dc?
What is the smallest known magnet?
What is a galvanometer?
Has the earth’s magnetic field always been the same as it is now? How has it changed?
Magnetism and Induction Review
For the test over magnetism and induction, you should know:
How will a magnet which is free to rotate, such as a compass, align itself with the earth’s magnetic field?
How do opposite poles affect each other? What about like poles?
What do you get when you break a magnet in half? Can you ever make it small enough to get just one
magnetic pole?
What is the source of magnetic fields?
What are magnetic domains?
Where is the magnetic pole in the northern hemisphere? Is it in the same place as the geographic pole?
What type of magnetic pole is it?
What is the commonly accepted theory for the source of earth’s magnetic field?
Which direction are magnetic field lines drawn? (Which way do the arrows point?)
What conditions are necessary for induction to occur?
How are the number of turns in a coil related to the induced voltage?
What does a generator consist of? How about a motor? How are they different?
What is the function of a generator? a motor?
What is a transformer?
What is the relationship between primary & secondary turns and voltages?
Ignoring energy losses due to heating of the coils, how do secondary and primary power compare? What
about energy? What about currents?
Is secondary voltage higher or lower than primary voltage in a step-up transformer?
Why do power companies transmit energy as ac rather than dc?
What is the smallest known magnet?
What is a galvanometer?
Has the earth’s magnetic field always been the same as it is now? How has it changed?