Chapter 17 review

    Standardized test practice
      Two batteries connected in parallel
    1. Two batteries are connected together as shown in the figure. What is the value of the voltage across them?
      1. 0 V
      2. 0.75 V
      3. 1.5 V
      4. 3 V

    2. Which statement or statements below provide a correct practical definition of a voltage source?
      1. A voltage source creates an electric potential difference between two points in a circuit, such as the two ends of a battery.
      2. A voltage source provides the electrical potential energy needed for a circuit to operate.
      3. A voltage source is analogous to the pump in a system of circulating water.
      4. All of the above

    3. Which of the following is not a good electrical insulator?
      1. wood
      2. air
      3. water
      4. plastic

    4. What is the correct relationship among current, resistance, and voltage?
      1. Current is directly proportional to resistance and voltage.
      2. Current is directly proportional to resistance and inversely proportional to voltage.
      3. Current is inversely proportional to resistance and directly proportional to voltage.
      4. Current is inversely proportional to both resistance and voltage.

      5. A 1.5 V battery
    5. What does the label “1.5 V” on the battery mean?
      1. The voltage of the positive terminal is 1.5 V.
      2. The voltage of the negative terminal is 0 V.
      3. The potential difference between the two terminals is 1.5 V.
      4. All of the above

    1. A circuit consists of a battery plus two resistors connected in parallel with each other. How do you connect the data acquisition probes for a digital multimeter to measure the current through one of the resistors?
      1. in parallel across the resistor
      2. in series with the resistor
      3. in parallel across the battery
      4. in series with the battery

      2. Electric circuit for question
    2. What is the current through the circuit shown?
      1. 0.1 A
      2. 0.4 A
      3. 1 A
      4. 4 A

    3. A mobile phone charger draws 0.2 A of current from the 120 V wall outlet. How much energy does it use if it were plugged in for 24 hours?
      1. 0.024 kWh
      2. 0.58 kWh
      3. 35 kWh
      4. 2,070 kWh

    4. A 50 Ω lamp is connected to a 120 V electrical outlet. How much power is consumed by the lamp?
      1. 2.4 W
      2. 20.8 W
      3. 288 W
      4. 6,000 W

    5. Four 1 Ω resistors are connected in parallel across a 10 V battery. What is the equivalent resistance of the circuit?
      1. 0.1 Ω
      2. 0.25 Ω
      3. 4 Ω
      4. 10 Ω

    6. Which of the following can be done with data acquisition probes and a digital multimeter?
      1. Voltage can be measured.
      2. Power can be measured.
      3. Continuity can be tested.

      1. I only
      2. I and II only
      3. I and III only
      4. I, II, and III

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