Deck 12: Inductance in Alternating Current Schedules

Question 1

The current-limiting property of the inductor is called ____.

A) reactance
B) voltage
C) resistance
D) capacitance

Answer 1

A

Question 2

In a pure resistive circuit, the true power is equal to the product of the ____.

A) voltage and resistance
B) voltage and current
C) voltage and inductance
D) resistance and current

Answer 2

B

Question 3

The symbol for an inductor shown without two parallel lines represents a(n) ____ inductor.

A) air core
B) transient
C) straight line
D) iron core

Answer 3

A

Question 4

To determine the Q of an inductor, divide the inductive reactance by the ____.

A) voltage
B) amperage
C) resistance
D) wattage

Question 5

the symbol for impedance is the letter ____.

A) Z
B) H
C) L
D) R

Question 6

____________________ is one of the primary types of loads in alternating current circuits because of the continually changing magnetic fields.

Question 7

Although inductors have some amount of resistance, inductors that have a Q of ____ or greater are generally considered to be pure inductors.

A) 8
B) 10
C) 15
D) 20

Question 8

To compute the value of impedance for the coil, the inductive reactance and the resistance must be ____.

A) multiplied
B) added
C) divided
D) subtracted

Question 9

Inductive reactance can be computed when the values of inductance and frequency are known and is measured in ____.

A) watts
B) ohms
C) vectors
D) amperage

Question 10

The amount of resistance compared with the inductive reactance determines the ____ of the coil.

A) H
B) voltage
C) F
D) Q

Question 11

In a pure inductive circuit, no ____ is (are) produced.

A) amperage
B) voltage
C) watts
D) resistance

Question 12

In a pure inductive circuit, the current lags the voltage by ____ degrees.

A) 270
B) 180
C) 90
D) 0

Question 13

The symbol for an inductor shown with two parallel lines represents a(n) ____ inductor.

A) air core
B) transient
C) straight line
D) iron core

Question 14

Reactance is symbolized by the letter ____.

A) R
B) L
C) X
D) Z

Question 15

Although essentially no true power is being used, an electrical instrument called VARs is used to measure the ____ in a pure inductive circuit.

A) capacitance
B) resistance
C) amperage
D) reactive power

Question 16

If two inductors, with values of 2 H and 3 H, are connected in parallel, the total inductance would equal ____ H.

A) 2
B) 1.2
C) 1
D) .83

Question 17

A(n) ____________________ voltage is always opposite in polarity to the applied voltage.

Question 18

Although not considered in the circuit calculations of most circuits, inductance is considered in the circuit calculations of circuits that contain motors, transformers, lighting ballast, and chokes that all contain ____________________ of wire.

Question 19

When magnetic lines of flux cut through a coil, a(n) ____________________ is induced in the coil.

Question 20

Reactive power is often referred to as ____ power.

A) capacitance
B) inductance
C) wattless
D) impedance

Question 21

If an inductor with an induced voltage of 106 V is connected to a 120-volt AC line, there will be ____________________ volts to push current through the wire resistance of the coil.

Question 22

The total inductive reactance of inductors connected in ____________________ equals the sum of the inductive reactances for all the inductors.

Question 23

VARs is equal to the amount of ____________________ flowing through an inductive circuit times the voltage applied to the inductive part of the circuit.

Question 24

When inductors are connected in ____________________, the total inductance of the circuit equals the sum of the inductances of all the inductors.

Question 25

If three inductors, all with a value of 3 H, are connected in parallel, the total inductance of the circuit would be ____________________ H.

Question 26

The symbol used to represent a(n) ____________________ depicts a coil of wire.

Question 27

VARs is an abbreviation for ______________________________.

Question 28

The total current-limiting effect of the inductor is a combination of the inductive reactance and the resistance, and is called ____________________.

Question 29

The Q of a circuit stands for its ____________________.

Question 30

In a parallel circuit, the reciprocal of the total ____________________ is equal to the sum of the reciprocals of all the inductors.