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- Question
What is magnetic flux?
Options- A. the number of lines of force in webers
- B. the number of lines of force in maxwells
- C. the number of lines of force in teslas
- D. the number of lines of force in flux density
- Correct Answer
- the number of lines of force in webers
- 1. Which of the following represents a true equivalent of an inductor?
Options- A. An inductance in series with a resistance and a capacitance
- B. A capacitance in parallel with the series combination of a resistance and an inductance
- C. An inductance in parallel with the series combination of a resistance and a capacitance
- D. The only quality a real inductor has is inductance. Discuss
- 2. A series RL filter circuit with an output across the inductor will result in what type of filtering?
Options- A. passing of the higher frequencies
- B. passing of the lower frequencies
- C. blocking of the higher frequencies
- D. blocking of a certain range of frequencies Discuss
- 3. What is the permeability of transformer iron?
Options- A. 50
- B. 450
- C. 1,500
- D. 5,500 Discuss
- 4. Opposition to current flow without the dissipation of energy is called:
Options- A. resistance
- B. inductive reactance
- C. counter emf
- D. impedance Discuss
- 5. Which of the following is NOT one of the three major types of fixed inductor?
Options- A. air core
- B. ferrite core
- C. magnesium core
- D. iron core Discuss
- 6. What is the total inductance, assuming no mutual inductance?
Options- A. 12 mH
- B. 6 mH
- C. 0.73 mH
- D. 0 mH Discuss
- 7. When a rate of one ampere per second causes an induced voltage of one volt, the unit of measure is
Options- A. a lenz
- B. an ohm
- C. a farad
- D. a henry Discuss
- 8. A magnetic field has:
Options- A. polar fields
- B. lines of force
- C. magnetomotive force
- D. lines of reluctance Discuss
- 9. If 360 Vac is the output of a 300-turn secondary winding, what is the input voltage when the primary winding has 150 turns?
Options- A. 2.4 Vac
- B. 150 Vac
- C. 180 Vac
- D. 720 Vac Discuss
- 10. What happens when moving expanding lines of force encounter a conductor?
Options- A. Current increases.
- B. Voltage is induced.
- C. Resistance is reduced.
- D. Power is increased. Discuss
Inductors problems
Search Results
Correct Answer: A capacitance in parallel with the series combination of a resistance and an inductance
Correct Answer: passing of the higher frequencies
Correct Answer: 5,500
Correct Answer: inductive reactance
Correct Answer: magnesium core
Correct Answer: 12 mH
Correct Answer: a henry
Correct Answer: lines of force
Correct Answer: 180 Vac
Correct Answer: Voltage is induced.
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