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Induced Electric Fields Practice Questions

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The following physics revision questions are provided in support of the physics tutorial on Induced Electric Fields. 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 Induced Electric Fields tutorials. The Induced Electric Fields 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
16.11Induced Electric Fields

Induced Electric Fields Revision Questions

1) A trial charge Q0 is moving at constant speed according a circular path (loop) of radius r = 4 cm. It takes 2 s to the charge to complete one revolution around the centre of loop. What is the electric field induced in the loop if the magnetic field during this time decreases from 0.8 T to 0.2 T?

(Hint! The area of coil produced by the moving charge is A = π ∙ r2)

Physics
  1. 0.006 V/m
  2. 0.012 V/m
  3. 0.024 V/m
  4. 0.06 V/m

Correct Answer: A

2) A test charge Q0 is placed inside a uniform magnetic field. The charge is moving at constant speed according a circular path of radius 8 cm. What is the electric field induced in the loop if the emf induced due to the interaction between the electric charge and magnetic field is 12 V?

Physics
  1. 11.9 V/m
  2. 23.9 V/m
  3. 0.24 V/m
  4. 0

Correct Answer: B

3) What is the work done on a 2μC test charge moving in a circular path inside a uniform magnetic field if the radius of circle is 20 cm and the electric field induced due to this process is 4 V/m?

Physics
  1. 10 J
  2. 1 J
  3. 0.1 J
  4. 0.01 J

Correct Answer: B

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