Discussion
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- Question
When a transformer secondary lead has been connected to a middle loop that is not an end connector, it is called a:
Options- A. multiple-tapped secondary
- B. center-tapped secondary
- C. multiple winding secondary
- D. single winding secondary
- Correct Answer
- center-tapped secondary
- 1. Indication of transformer primary and secondary voltage relationships is accomplished by:
Options- A. color-coded wires
- B. dot notation
- C. black, rather than gray, casings
- D. winding ratios Discuss
- 2. What is the inductive reactance?
Options- A. 5.2 Ω
- B. 7.5 Ω
- C. 1.3 kΩ
- D. 7.5 kΩ Discuss
- 3. What is remanence?
Options- A. reactance
- B. reluctance
- C. retentitivity
- D. resistance Discuss
- 4. Electromagnetism is the:
Options- A. magnetic field caused by a permanent magnet
- B. action between a permanent and an artificial magnet
- C. magnetic field action with a current-carrying wire
- D. current in the coil Discuss
- 5. When a magnet enters a coil and a voltage is induced, the process is known as:
Options- A. an alternation
- B. self-inductance
- C. counter emf
- D. flux linkage Discuss
- 6. Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?
Options- A. The coil windings must be the same.
- B. coil 1
- C. The coil ratio is too small.
- D. coil 2 Discuss
- 7. Inductance is:
Options- A. directly proportional to the length of the coil
- B. directly proportional to the number of turns on the coil
- C. inversely proportional to the cross-sectional area of the coil
- D. inversely proportional to the permeability Discuss
- 8. What type of device consists of a coil with a moveable iron core?
Options- A. solenoid
- B. reed switch
- C. relay
- D. armature Discuss
- 9. A value of "ten to the eighth power magnetic lines of force" is for the term:
Options- A. field
- B. flux
- C. coulomb
- D. weber Discuss
- 10. As current travels within a conductor:
Options- A. the magnetic field aids the current
- B. a magnetic field is developed around it
- C. the wire tries to point north
- D. an electrostatic field opposes the current Discuss
Inductors problems
Search Results
Correct Answer: dot notation
Correct Answer: 7.5 kΩ
Correct Answer: retentitivity
Correct Answer: magnetic field action with a current-carrying wire
Correct Answer: flux linkage
Correct Answer: coil 2
Correct Answer: directly proportional to the number of turns on the coil
Correct Answer: solenoid
Correct Answer: weber
Correct Answer: a magnetic field is developed around it
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