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Circuits Practice Problems for AP Physics B & C

based on 3 ratings
By — McGraw-Hill Professional
Updated on Feb 12, 2011

Review the following concepts if necessary:

Problems

Multiple Choice:

Practice Problem

  1. A 100 Ω, 120 Ω, and 150 Ω resistor are connected to a 9-V battery in the circuit shown above. Which of the three resistors dissipates the most power?
    1. the 100 Ω resistor
    2. the 120 Ω resistor
    3. the 150 Ω resistor
    4. both the 120 Ω and 150 Ω
    5. all dissipate the same power
  2. A 1.0-F capacitor is connected to a 12-V 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?
    1. 36 m
    2. 72 m
    3. 144 m
    4. 24 m
    5. 12 m
  3. Practice Problem

  4. Three resistors are connected to a 10-V battery as shown in the diagram above. What is the current through the 2.0 Ω resistor?
    1. 0.25 A
    2. 0.50 A
    3. 1.0 A
    4. 2.0 A
    5. 4.0 A
  5. Practice Problem

  6. Three capacitors are connected as shown in the diagram above. C1 = 2μ;F; C2 = 4μF; C3 = 6μF. If the battery provides a potential of 9 V, how much charge is stored by this system of capacitors?
    1. 3.0 μC
    2. 30 μC
    3. 2.7 μC
    4. 27 μC
    5. 10 μC
  7. What is the resistance of an ideal ammeter and an ideal voltmeter?

Free Response:

  1.  
  2. Practice Problem

    1. Simplify the above circuit so that it consists of one equivalent resistor and the battery.
    2. What is the total current through this circuit?
    3. 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: ______
    4. 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: ______
    5. 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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