Discussion
Home ‣ Electronics ‣ Inductors Comments
- Question
If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?
Options- A. 5.0 W
- B. 1.25 pW
- C. 9.5 W
- D. 20.0 mW
- Correct Answer
- 5.0 W
- 1. The time required for one weber of flux to cut a conductor and produce one volt is:
Options- A. one revolution
- B. one second
- C. one millisecond
- D. four revolutions Discuss
- 2. The time difference, or lag, between flux density and magnetizing force is known as:
Options- A. eddy current
- B. magnetic saturation
- C. hysteresis
- D. coercivity Discuss
- 3. The unit of flux density is:
Options- A. magnetomotive force
- B. a weber
- C. a maxwell
- D. a tesla Discuss
- 4. A transformer is used:
Options- A. to couple electric energy from one dc circuit to another
- B. to couple electric energy from an ac circuit to a dc circuit
- C. to couple electric energy from a dc circuit to an ac circuit
- D. to couple electric energy from one ac circuit to another Discuss
- 5. Faraday's law states that the:
Options- A. direction of the induced voltage produces an opposition
- B. direction of an induced current produces an aiding effect
- C. emf depends on the rate of cutting flux
- D. emf is related to the direction of the current Discuss
- 6. A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?
Options- A. a lenz
- B. an ohm
- C. a farad
- D. a henry Discuss
- 7. What is electromagnetism?
Options- A. the magnetic field generated around a conductor when a current passes through it
- B. the magnetic field generated in a conductor by an external voltage
- C. the voltage caused by a magnetic field in a conductor
- D. the current generated by an external magnetic field Discuss
- 8. What is the total inductance of a 5 H and a 100 mH coil connected in parallel?
Options- A. 4.76 mH
- B. 33.3 mH
- C. 98.0 mH
- D. 150.0 mH Discuss
- 9. What does Faraday's law concern?
Options- A. a magnetic field in a coil
- B. a magnetic field cutting a conductor
- C. a magnetic field hystersis
- D. a magnetic field in a conductor Discuss
- 10. Providing a constant output regardless of ac input or load resistance changes is the function of a:
Options- A. transformer
- B. filter
- C. regulator
- D. rectifier Discuss
Inductors problems
Search Results
Correct Answer: one second
Correct Answer: hysteresis
Correct Answer: a tesla
Explanation:
tesla or weber/m2 is the unit of flux density
Correct Answer: to couple electric energy from one ac circuit to another
Correct Answer: emf depends on the rate of cutting flux
Correct Answer: a henry
Correct Answer: the magnetic field generated around a conductor when a current passes through it
Correct Answer: 98.0 mH
Correct Answer: a magnetic field cutting a conductor
Correct Answer: regulator
Comments
There are no comments.More in Electronics:
Programming
Copyright ©CuriousTab. All rights reserved.