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Free Practice Quiz Question List

3 Basic Circuit Components Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Basic Circuit Components, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: An open switch ideally allows current to flow through its path as if it were a wire.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

An incandescent lamp produces light by heating a until it glows; its resistance changes as it .

03
Choose one
1 point

In a simple DC circuit, what does an ideal capacitor do after it has charged to a steady voltage?

  1. A

    It continues to carry a steady current indefinitely.

  2. B

    It carries no steady DC current.

  3. C

    It changes into a resistor with zero resistance.

  4. D

    It reverses the source's polarity.

04
True or false
1 point

True or false: An ideal inductor opposes changes in current, but behaves like a wire in a settled DC circuit.

  1. A

    True

  2. B

    False

05
Fill in the blank
1 point

A battery is a common voltage source, and its terminals have fixed .

06
Written response
1 point

What electrical quantity is measured in henries (H)?

07
Choose one
1 point

A lamp is connected to a source that supplies more voltage than the lamp's rating. Which outcome is a concern?

  1. A

    Its voltage rating is irrelevant if the source is DC.

  2. B

    A higher-than-rated voltage guarantees longer lamp life.

  3. C

    Supplying too much voltage can cause excessive current and damage.

  4. D

    A lamp's rating describes only its physical size.

08
Choose all
1 point

Select all statements about component ratings that are supported.

  1. A

    A component's ratings can include maximum voltage, current, and power.

  2. B

    A component's rating is unimportant if it performs the desired function.

  3. C

    A resistor's power rating should be suitable to help prevent overheating.

  4. D

    A lamp's rating indicates the voltage or power for which it is designed.

  5. E

    Every component can safely operate at any current as long as its voltage is correct.

09
Choose all
1 point

Select all statements about electrical sources that are supported.

  1. A

    A source can provide electrical energy by maintaining a voltage or supplying a current.

  2. B

    A source alone does not guarantee current flow; there must be a complete conducting path.

  3. C

    An AC source maintains the same voltage and current direction at all times.

  4. D

    An AC source periodically reverses its voltage and current direction.

  5. E

    A battery is a common DC voltage source with fixed positive and negative terminal polarities.

10
Written response
1 point

An ideal 3 kΩ3\text{ k}\Omega resistor is connected across 12 V12\text{ V}. Using Ohm's law, what current flows? Enter the value in milliamperes (mA).

11
Choose one
1 point

A 9 V9\text{ V} source powers an LED with a forward voltage of about 2 V2\text{ V}. What approximate series resistance would give a current of 10 mA10\text{ mA}, using the simplified model?

  1. A

    70 Ω70\,\Omega

  2. B

    700 Ω700\,\Omega

  3. C

    900 Ω900\,\Omega

  4. D

    1100 Ω1100\,\Omega

12
Open ended
1 point

Compare a capacitor and an inductor by describing where each stores energy and what kind of electrical change each opposes.

13
Choose one
1 point

A source, an open switch, and a lamp are connected in one series loop. What happens to the current through the lamp in the ideal circuit?

  1. A

    The lamp continues to receive current from the source.

  2. B

    Ideally, no current flows through the lamp because the path is broken.

  3. C

    The lamp receives current only while the switch is open.

  4. D

    The source changes its polarity when the switch opens.

14
True or false
1 point

True or false: Supplying a lamp with more voltage than it is designed for can cause excessive current and damage it.

  1. A

    True

  2. B

    False

15
Choose one
1 point

Which statement correctly distinguishes a battery used as a DC source from an AC source?

  1. A

    A battery reverses its terminal polarity periodically, while an AC source keeps fixed polarity.

  2. B

    A battery has fixed positive and negative terminal polarities, while an AC source periodically reverses its voltage and current direction.

  3. C

    Both types of source always maintain fixed polarity.

  4. D

    Neither type of source can drive current in a complete circuit.

16
Choose one
1 point

A diode is connected between two circuit nodes. Which condition makes it forward biased?

  1. A

    The cathode is at a higher potential than the anode.

  2. B

    The anode and cathode must always have identical potentials.

  3. C

    The anode is at a higher potential than the cathode.

  4. D

    The diode is disconnected from the circuit.

17
Written response
1 point

Which component provides resistance to limit current and commonly converts electrical energy into heat?

18
Choose one
1 point

In a simple DC circuit, an ideal capacitor has finished charging and its voltage is steady. What current does it carry in this settled condition?

  1. A

    It carries no steady DC current after charging is complete.

  2. B

    It carries the same steady DC current as it did while charging.

  3. C

    It reverses the source polarity after charging.

  4. D

    It becomes a source that guarantees current even without a complete path.

19
Choose one
1 point

The current through an inductor begins to increase. What is the inductor's response during this change?

  1. A

    It immediately prevents all current from flowing.

  2. B

    It converts all stored magnetic energy into light.

  3. C

    It induces a voltage that acts against the change in current.

  4. D

    It keeps the current changing at an increasing rate.

20
Written response
1 point

A capacitor has capacitance 4 μF4\,\mu\text{F} and voltage 3 V3\,\text{V}. Using Q=CVQ=CV, what charge does it store? Enter the value in microcoulombs.