Electronics - Inductors

Exercise :: Inductors - General Questions

64. 

You could decrease the time constant of an RL circuit by

A. adding a resistor in parallel with the circuit resistance
B. adding an inductor in series with the circuit inductance
C. decreasing the amplitude of the input voltage
D. exchanging the position of the resistor and inductor in the circuit

Answer: Option B

Explanation:

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65. 

Indication of transformer primary and secondary voltage relationships is accomplished by:

A. color-coded wires
B. dot notation
C. black, rather than gray, casings
D. winding ratios

Answer: Option B

Explanation:

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66. 

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

Explanation:

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67. 

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

Explanation:

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68. 

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

Explanation:

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69. 

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

Explanation:

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70. 

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

Explanation:

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