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Physics 2
Review Chapter 36,37
1. What is the source of all magnetism? Include both ways?
2. What happens when like poles of a magnet are brought together? Unlike poles?
3. What happens to the poles of a magnet when it is broken in half?
4. How does a compass react when placed in a magnetic field?
5. How does the strength of a magnetic field vary around a magnet?
6. What does the magnetic field look like around a current carrying wire?
7. If the wire is bent into a loop, where is the field strongest?
8. How can the strength of the magnetic field of a loop of wire be increased?
9. What is the most likely cause of earth’s magnetic field?
10. What direction are the magnetic field lines drawn?
11. What happens to the voltage and current in a loop of wires if the number of coils
is doubled or tripled?
12. What happens to the voltage and current in a loop of wires if the magnet is moved
in and out of the coil more rapidly?
13. What are the parts of a transformer and what is its purpose?
14. What is the difference between a step-up and a step-down transformer?
15. How can current be induced in a wire without a battery or generator?
16. What are the energy conversions involved with an electric motor?
17. What are the energy conversions involved with a generator?
Problems
1. If a transformer has 100 turns on the primary and 200 turns on the secondary what
voltage output is there if the input voltage is 120V?
2. If a transformer changes the voltage from 120 volts to 6 volts and the primary has
600 turns, how many turns are on the secondary?
3. If a transformer has 1000 turns on the primary and 2500 turns on the secondary
and has an input voltage of 400 volts and the secondary is connected to a 5 amp
motor, what is the power output?