Inductors Questions and Answers

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Q51
As a generator armature passes the 270 degree point, the induced voltage is:
  • A at maximum negative
  • B between maximum negative and zero
  • C at maximum positive
  • D between zero and maximum positive
Answer: Option A
Q52
A value of "ten to the eighth power magnetic lines of force" is for the term:
  • A field
  • B flux
  • C coulomb
  • D weber
Answer: Option D
Q53
A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?
  • A a lenz
  • B an ohm
  • C a farad
  • D a henry
Answer: Option D
Q54
What is the name of the part inside a relay that is moved by the action of the electromagnet?
  • A armature
  • B conductor
  • C contacts
  • D solenoid
Answer: Option A
Q55
If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?
  • A 5.0 W
  • B 1.25 pW
  • C 9.5 W
  • D 20.0 mW
Answer: Option A
Q56
The unit of flux density is:
  • A magnetomotive force
  • B a weber
  • C a maxwell
  • D a tesla
Answer: Option B
Q57
When used as a filter, an inductor is
  • A placed in series with the load and aids any current changes
  • B placed in parallel with the load and aids any current changes
  • C placed in parallel with the load and opposes any current changes
  • D placed in series with the load and opposes any current changes
Answer: Option D
Q58
A loaded transformer will achieve mutual induction when:
  • A secondary current increase causes a primary current decrease
  • B primary current is increased by an increase in secondary current
  • C primary current is decreased by an increase in secondary current
  • D secondary current decrease causes a primary current increase
Answer: Option B
Q59
Which transformer turns ratio is needed to match two 16-ohm parallel devices to an output of 22.2 ohms?
  • A 1.38:1
  • B 1.67:1
  • C 0.72:1
  • D 0.60:1
Answer: Option D
Q60
A transformer will have:
  • A primary and secondary windings
  • B primary and secondary current
  • C primary wattage producing secondary current
  • D different frequencies for the primary and secondary
Answer: Option A

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