Practice Electromagnetic Induction (1) - Electromagnetic Induction and Alternating

Practice: Electromagnetic Induction

Lesson 1Electromagnetic Induction and Alternating

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9 questions

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6 sample questions

Question 1.
What does Faraday's first law of electromagnetic induction state?
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Think about changes in magnetic fields.
Question 2.
What is Lenz's Law?
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Consider how energy conservation plays a role.
3Question 3.
What does Faraday's second law state?
- Induced emf is constant
- Magnitude of induced emf is proportional to change rate of magnetic flux
- Induced emf direction depends on resistance
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Think about the relationship between rate and value.
4Question 4.
True or False: Lenz's law states that the induced current always flows in the same direction.
- True
- False
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Reflect on what opposing means.
Question 5.
An induction cooktop with a changing magnetic field of 4 T induces currents in a pot located above. Assuming the pot is a circle of radius 0.1 m, determine the maximum induced emf if the rate of change of the magnetic field is 2 T/s.
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Break down the steps using magnetic area and change rates.
Question 6.
Consider a coil with a self-inductance of 2 H experiencing a current change rate of 3 A/s. Find the induced emf in the coil.
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Use the inductance relationship to find induced emf.

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