Electronics - Inductors

Exercise :: Inductors - General Questions

71. 

The unit of flux density is:

A. magnetomotive force
B. a weber
C. a maxwell
D. a tesla

Answer: Option D

Explanation:

tesla or weber/m2 is the unit of flux density

72. 

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

Explanation:

No answer description available for this question. Let us discuss.

73. 

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

Explanation:

No answer description available for this question. Let us discuss.

74. 

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

Explanation:

No answer description available for this question. Let us discuss.

75. 

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

Explanation:

No answer description available for this question. Let us discuss.

76. 

What is the phase angle of a 24 Vac parallel RL circuit when R = 45 ohms and XL = 1100 ohms?

A. 0.001 degrees
B. 2.300 degrees
C. 87.600 degrees
D. 89.900 degrees

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

77. 

A winding of wire can be called

A. an inductor
B. a coil
C. a choke
D. All of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.