D.4 Induction Quiz
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5 questions, one answer each
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1. A 0.20 T field is perpendicular to the plane of a coil of area 0.050 m². The flux through one turn is:
- A. 0.010 Wb
- B. 0.25 Wb
- C. 4.0 Wb
- D. 0 Wb
2. The flux linkage of a coil falls uniformly from 0.30 Wb to zero in 0.10 s. The induced emf is:
- A. 0.030 V
- B. 3.0 V
- C. 30 V
- D. 0.30 V
3. A 0.50 m rod moves at 4.0 m s⁻¹ perpendicular to a 0.10 T field. The emf is:
- A. 0.20 V
- B. 0.80 V
- C. 2.0 V
- D. 20 V
4. Lenz's law is a consequence of the conservation of:
- A. Charge
- B. Momentum
- C. Energy
- D. Mass
5. A generator coil's rotation frequency is tripled. The peak emf:
- A. Is unchanged
- B. Triples
- C. Increases nine times
- D. Falls to one third