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Power in an Alternating Circuit. Transformers Practice Questions

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Magnetism Learning Material
Tutorial IDTitleTutorialVideo
Tutorial		Revision
Notes		Revision
Questions
16.17Power in an Alternating Circuit. Transformers

Power in an Alternating Circuit. Transformers Revision Questions

1) The values shown by a multimeter connected to an AC circuit are 6A and 200 V respectively. What is the maximum power of the source?

  1. 33.3 W
  2. 600 W
  3. 1200 W
  4. 2400 W

Correct Answer: D

2) Calculate the power factor of the RLC circuit shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Power in an Alternating Circuit. Transformers
  1. 0.95
  2. 0.72
  3. 0.28
  4. 0.05

Correct Answer: A

3) A step-up transformer has 80 turns in the primary coil and 1200 turns in the secondary coil. What is the output voltage if the input voltage is 18 V and the transformer is 90% efficient?

  1. 180 V
  2. 220 V
  3. 243 V
  4. 270 V

Correct Answer: C

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