AS113 - Homework - Alternating Current Inductance and Capacitance Flashcards
Inductive reactance is measured in _____
Answer 1:
ohms
In a purely inductive circuit, the current ____ the voltage
Answer 1:
lags
The phase angle between the current and voltage in a purely inductive circuit is ____ degrees.
90
The amount of inductions in a coil is affected by the :
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
A(n) _________ is used to step up or step down an AC voltage
Answer 1:
transformer
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 1:
choke
Inductive reactance in indicated by the symbol __
Answer 1:
XL
Inductance is measured in _____ .
Answer 1:
henrys
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 1:
inductive reactance
The power factor of a purely inductive circuit is __
Answer 1:
0
Inductive reactance _____ as the frequency increases.
Answer 1:
increases
Increasing the inductance of a coil will ________ the amount of AC that can flow through it.
Answer 1:
decrease
The reference dielectric is air which has a dielectric constant of __
Answer 1:
1
The time constant of a capacitive circuit is determined by the ______ and the ______ of the circuit.
Answer 1:
capacitance
Answer 2:
resistance
The basic unit of capacitance is ______
Answer 1:
farads
The total opposition to the flow of alternating current is called _______ .
Answer 1:
impedance
Three types of opposition to the flow of alternating current are:
resistance
capacitive reactance
inductive reactance
A capacitor with a thin dielectric has _____ capacity than the same capacitor with a thick dielectric
more
The total reactance is the ______ ______ the inductive and the capacitive reactance
Answer 1:
difference between
The strength of an electrostatic field is determined by the _____
Answer 1:
voltage
In an R-C circuit, changes in current ____ changes in the voltage.
Answer 1:
lead
When a large amount of capacity is needed with a low working voltage, a(n) ________ capacitor is used.
Answer 1:
electrolytic
Electrical energy is stored in a capacitor in ________ fields
Answer 1:
electrostatic
Fifty microfarads = _____ farads.
.000050
The opposition to the flow of alternating current caused by a capacitor in a circuit is known as ______ ______.
Answer 1:
capacitive reactance
The working voltage of a capacitor is rated in ___ volts
Answer 1:
DC
The formulas for finding total series capacitance are the same as those used for finding the total resistance of resistors connected in _______
Answer 1:
parallel
Capacitive reactance ______ as the frequency of the circuit increases.
Answer 1:
decreases
