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RL Circuits Practice Questions

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The following physics revision questions are provided in support of the physics tutorial on RL Circuits. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the RL Circuits tutorials. The RL Circuits calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Magnetism Learning Material
Tutorial IDTitleTutorialVideo
Tutorial		Revision
Notes		Revision
Questions
16.12RL Circuits

RL Circuits Revision Questions

1) A 4Ω resistor and a 2H inductor are connected in the same circuit supplied by a 20V battery. What is the current in the circuit 0.01 s after the switch is moved at the position a?

Physics Tutorials: This image provides visual information for the physics tutorial RL Circuits
  1. 5.0 A
  2. 4.9 A
  3. 0.2 A
  4. 0.1 A

Correct Answer: D

2) A RL circuit having a 10 Ω resistor and a 0.2 H inductor connected in series, is supplied by a 24 V battery, as shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial RL Circuits

What is the current flowing through the circuit 0.05 s after the switch turns OFF after being ON for a long time?

  1. 0
  2. 0.197 A
  3. 1.97 A
  4. 2.4 A

Correct Answer: B

3) A RC circuit that contains a 18Ω resistance and a 2H inductor is supplied by a battery, as shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial RL Circuits

How long does it take the current to drop at 20% of its initial value after the switch S turns OFF?

  1. 0.077 s
  2. 1.61 s
  3. 0.161 s
  4. 0.179 s

Correct Answer: D

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  2. Magnetism Physics tutorial: RL Circuits. Read the RL Circuits physics tutorial and build your physics knowledge of Magnetism
  3. Magnetism Revision Notes: RL Circuits. Print the notes so you can revise the key points covered in the physics tutorial for RL Circuits
  4. Check your calculations for Magnetism questions with our excellent Magnetism calculators which contain full equations and calculations clearly displayed line by line. See the Magnetism Calculators by iCalculator™ below.
  5. Continuing learning magnetism - read our next physics tutorial: Energy Stored in a Magnetic Field. Energy Density of a Magnetic Field. Mutual Induction

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