Deck 3: Inductance in Alternating-Current Circuits

Question 1

____________________ is defined as the ratio between the true power in watts and the apparent power in volt-amperes.

Answer 1

Power factor (PF)
Power factor
PF

Question 2

One radian is equal to the angle at the center of a circle, subtended by an arc whose length is equal to the radius.

Answer 2

True

Question 3

In a direct-current circuit, there will be no inductive effect once the current reaches the value defined by Ohm's law and remains constant.

Answer 3

True

Question 4

Any quantity having both magnitude and direction is called a(n) ____________________.

Question 5

Explain the difference between adding vectors that are in a straight line and those that are not in a straight line.

Question 6

What is Lenz's law?

Question 7

The combined effect of resistance and inductive reactance is called ____________________.

Question 8

____________________ is a measure of the amount of electrical energy converted to some other form.

Question 9

What is phase angle or angle theta?

Question 10

Impedance is represented by the letter I.

Question 11

Explain how the impedance triangle is obtained.

Question 12

____________________ is the ability of a circuit component, such as a reactor coil, to store energy in the electromagnetic field.

Question 13

The basic rule of vector addition cannot be applied to vector combinations that are not in a straight line.

Question 14

List the definition of a henry (H).

Question 15

Reactive power is expressed in a unit called volt-amperes-reactive.