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RC Circuits

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The following physics revision questions are provided in support of the physics tutorial on RC 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 RC Circuits tutorials. The RC 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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Electrodynamics Learning Material
Tutorial IDTitleTutorialVideo
Tutorial		Revision
Notes		Revision
Questions
15.7RC Circuits

RC Circuits Revision Questions

1. A 40 μF capacitor is connected in series with a 10 Ω resistor in a circuit supplied by a 24 V battery as shown in the figure.

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

The switch has been for a long time at the position a and then it is moved to position b. What is the potential difference between the plates of capacitor after 0.3 ms?

  1. 11.3 V
  2. 18.7 V
  3. 24.0 V
  4. 0 V

Correct Answer: A

2. A 60 μF capacitor is connected in series with a 20 Ω resistor in a circuit supplied by a 6V battery as shown in the figure.

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

The switch has been for a long time at the position b and then it is moved to position a. How much time does it take to the battery to charge the capacitor at 90% of its full capacity?

  1. 2.30 ms
  2. 2.76 ms
  3. 1.2 ms
  4. 0.3 ms

Correct Answer: B

3. How much charge is stored in the capacitor shown in the figure 0.3 ms after the switch is moved from the position b to position a?

Physics Tutorials: This image provides visual information for the physics tutorial RC Circuits
  1. 600 μC
  2. 6 μC
  3. 60 μC
  4. 0.5 C

Correct Answer: C

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  4. Check your calculations for Electrodynamics questions with our excellent Electrodynamics calculators which contain full equations and calculations clearly displayed line by line. See the Electrodynamics Calculators by iCalculator™ below.
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