AS113 - Homework - Alternating Current Inductance and Capacitance

Question 1

Inductive reactance is measured in _____

Answer 1

Answer 1:
ohms

Question 2

In a purely inductive circuit, the current ____ the voltage

Answer 2

Answer 1:
lags

Question 3

The phase angle between the current and voltage in a purely inductive circuit is ____ degrees.

Answer 3

90

Question 4

The amount of inductions in a coil is affected by the :

Answer 4

wire size/ ratio of diameter of coil to length

number of layers of windings

space between turns

number of turns in the coil

material used for core

Question 5

A(n) _________ is used to step up or step down an AC voltage

Answer 5

Answer 1:
transformer

Question 6

A(n) ____ is a type of inductor installed in a circuit to impede the flow of AC of a particular frequency, while not affecting the flow of AC below that frequency.

Answer 6

Answer 1:
choke

Question 7

Inductive reactance in indicated by the symbol __

Answer 7

Answer 1:
XL

Question 8

Inductance is measured in _____ .

Answer 8

Answer 1:
henrys

Question 9

The opposition to current flow in a conductor is caused by the generation of back voltage as the magnetic field cuts across the conductor is called _______ _______.

Answer 9

Answer 1:
inductive reactance

Question 10

The power factor of a purely inductive circuit is __

Answer 10

Answer 1:
0

Question 11

Inductive reactance _____ as the frequency increases.

Answer 11

Answer 1:
increases

Question 12

Increasing the inductance of a coil will ________ the amount of AC that can flow through it.

Answer 12

Answer 1:
decrease

Question 13

The reference dielectric is air which has a dielectric constant of __

Answer 13

Answer 1:
1

Question 14

The time constant of a capacitive circuit is determined by the ______ and the ______ of the circuit.

Answer 14

Answer 1:
capacitance
Answer 2:
resistance

Question 15

The basic unit of capacitance is ______

Answer 15

Answer 1:
farads

Question 16

The total opposition to the flow of alternating current is called _______ .

Answer 16

Answer 1:
impedance

Question 17

Three types of opposition to the flow of alternating current are:

Answer 17

resistance
capacitive reactance
inductive reactance

Question 18

A capacitor with a thin dielectric has _____ capacity than the same capacitor with a thick dielectric

Answer 18

more

Question 19

The total reactance is the ______ ______ the inductive and the capacitive reactance

Answer 19

Answer 1:
difference between

Question 20

The strength of an electrostatic field is determined by the _____

Answer 20

Answer 1:
voltage

Question 21

In an R-C circuit, changes in current ____ changes in the voltage.

Answer 21

Answer 1:
lead

Question 22

When a large amount of capacity is needed with a low working voltage, a(n) ________ capacitor is used.

Answer 22

Answer 1:
electrolytic

Question 23

Electrical energy is stored in a capacitor in ________ fields

Answer 23

Answer 1:
electrostatic

Question 25

Fifty microfarads = _____ farads.

Answer 25

.000050

Question 26

The opposition to the flow of alternating current caused by a capacitor in a circuit is known as ______ ______.

Answer 26

Answer 1:
capacitive reactance

Question 27

The working voltage of a capacitor is rated in ___ volts

Answer 27

Answer 1:
DC

Question 28

The formulas for finding total series capacitance are the same as those used for finding the total resistance of resistors connected in _______

Answer 28

Answer 1:
parallel

Question 29

Capacitive reactance ______ as the frequency of the circuit increases.

Answer 29

Answer 1:
decreases