AP Physics Spring 2009
Week 1: Electric Currents and DC Circuits and Magnetism
Chapters 18

19
Due: _______________
Objectives:
1.
Define ampere as unit of electrical current.
2.
Distinguish between conventional flow and electron flow.
3.
State Ohm’s Law for elect
rical components.
4.
Define the unit of resistance.
5.
Determine the potential drop across a resistance carrying a given current.
6.
Define the factors determining the resistance of a wire.
7.
Calculate resistance of a wire given resistivity, length, and radius.
8.
Defin
e the watt as a unit of electrical power.
9.
Determine the power loss across a given current carrying resistance.
10.
Calculate the resistance across a bank of resistors in series, parallel, and
combined.
11.
Define emf and its role in DC electrical theory.
12.
Distingui
sh between emf and potential difference.
13.
Define and describe voltage, current, and equivalent resistance for resistors
connected in series, parallel, and combined.
14.
State Ohm’s Law for an entire electrical circuit and apply it to the solution of
electrical
problems involving internal battery resistance and total resistance of the
circuit.
15.
Calculate the total resistance of an entire DC circuit.
16.
Compute power loss in a given DC circuit.
17.
Determine the terminal voltage given the emf of a battery, its internal re
sistance,
and the load resistance.
18.
Understand the theory, operation, and use of an ammeter and voltmeter.
19.
Write and apply Kirchhoff’s Rules for electrical networks in the determination of
unknown currents.
20.
Analyze multiloop circuits using Ohm’s Law and Kir
chhoff’s Rules.
21.
Calculate the equivalent capacitance of a number of capacitors arranged in series,
parallel, and combination. Write the basic law of magnetic force and apply it to
physical situations.
Textbook Problems:
Chapter 18: 8, 12, 13, 28, 34
Cha
pter 19: 5, 7, 11, 15, 19, 24, 42
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