By Greg Jacobs  Joshua Schulman — McGrawHill Professional
Updated on Feb 12, 2011
Review the following concepts if necessary:
 Resistance and Ohm's Law for AP Physics B & C
 Resistors in Series and in Parallel for AP Physics B & C
 The VIR Chart for AP Physics B & C
 Kirchoff 's Laws for AP Physics B & C
 Circuits from an Experimental Point of View for AP Physics B & C
 RC Circuits: SteadyState Behavior for AP Physics B & C
 Circuits: Of Special Interest to Physics C Students
Problems
Multiple Choice:
 A 100 Ω, 120 Ω, and 150 Ω resistor are connected to a 9V battery in the circuit shown above. Which of the three resistors dissipates the most power?
 the 100 Ω resistor
 the 120 Ω resistor
 the 150 Ω resistor
 both the 120 Ω and 150 Ω
 all dissipate the same power
 A 1.0F capacitor is connected to a 12V power supply until it is fully charged. The capacitor is then disconnected from the power supply, and used to power a toy car. The average drag force on this car is 2 N. About how far will the car go?
 36 m
 72 m
 144 m
 24 m
 12 m
 Three resistors are connected to a 10V battery as shown in the diagram above. What is the current through the 2.0 Ω resistor?
 0.25 A
 0.50 A
 1.0 A
 2.0 A
 4.0 A
 Three capacitors are connected as shown in the diagram above. C_{1} = 2μ;F; C_{2} = 4μF; C_{3} = 6μF. If the battery provides a potential of 9 V, how much charge is stored by this system of capacitors?
 3.0 μC
 30 μC
 2.7 μC
 27 μC
 10 μC
 What is the resistance of an ideal ammeter and an ideal voltmeter?
Free Response:
 Simplify the above circuit so that it consists of one equivalent resistor and the battery.
 What is the total current through this circuit?
 Find the voltage across each resistor. Record your answers in the spaces below.
 Voltage across 200 Ω resistor: ______
 Voltage across 300 Ω resistor: ______
 Voltage across 400 Ω resistor: ______
 Voltage across 500 Ω resistor: ______
 Find the current through each resistor. Record your answers in the spaces below.
 Current through 200 Ω resistor: ______
 Current through 300 Ω resistor: ______
 Current through 400 Ω resistor: ______
 Current through 500 Ω resistor: ______
 The 500 Ω resistor is now removed from the circuit. State whether the current through the 200 Ω resistor would increase, decrease, or remain the same. Justify your answer.

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From 5 Steps to a 5 AP Physics B & C. Copyright © 2010 by The McGrawHill Companies. All Rights Reserved.
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