Download College Physical Science Chapter 9 Assignment MAGNETIC

College Physical Science
Chapter 9 Assignment
MAGNETIC FIELDS- read pg. 209-215
1. In what way is the rule for the interaction between magnetic poles similar to the rule for the
interaction between electric charges?
2. What produces a magnetic field?
3. Why is iron magnetic & wood is not?
4. What is the shape of a magnetic field about an electric current when the direction of the current is
reversed?
6. Why is the magnetic field strength inside a current carrying loop of wire greater than the field
strength about a straight section of wire?
MOTORS- read pg. 215-220
7. What relative direction between a magnetic field & a current-carrying wire results in the greatest
force on the wire? In the smallest force?
8. What happens to the direction of the magnetic force on a wire in a magnetic field when the current in
the wire is reversed?
9. State Faraday’s law
10. What are the three ways in which voltage can be induced in a wire?
ELECTRICAL POWER- read pg. 220-225
11. How does the frequency of induced voltage compare with how frequently a magnet is plunged into
& out of a coil of wire?
12. What are the basic differences & similarities between a generator & an electric motor?
13. Which of these does a transformer change: voltage, current, energy, power?
14. What is induced by the rapid alternation of the magnetic field?
15. What is induced by the rapid alternation of an electric field?