gen electricity

19 flashcardsby Misha
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1
The working voltage of a capacitor in an AC circuit should be
at least 50 percent greater than the highest applied voltage
2
The term that describbes the combined resistive forces in an AC circuit is
impedance
3
what is the opposition to the flow of AC produced by an electromagnetic field (EMF) with generated back voltage called?
inductive reactance
4
electrostatic fields are also known as
dielectric fields
5
the basis for transformer operation in the use of alternating current is mutual
inductance
6
the opposition offered by a coil to the flow of alternating current (ignoring resistance) is called
inductive reactance
7
what factors strengthen a coil inductor
adding coils close together
8
an increase in which of the following factors cause an increase in the inductive reactance of a circuit
inductance and frequency
9
refer to figure 1, pg 4. when different rated capacitors are connected in series in a circuit, the total capacitance is
less than the capacitance of the lowest rated capacitor
10
Capacitors are sometimes used in DC circuits to
smooth out slight pulsations in current/voltage
11
in an AC circuit, the effective voltage is
less than the maximum instantaneous voltage
12
the amount of electricity a capacitor can store is directly proportional to the
plate area and inversely proportional to the distance between the plates
13
refer to figure 2 pg 4. what is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively
.0125
14
What is the total capacitance of a circuit constaining three capacitors in parallel with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively
.170
15
convert farads to micrrofards by
multiplying farads by 10 to the power of 6
16
convert farads to picofarads by
multiplying farads by 10 to the power of 12
17
unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be
effective values
18
when different rated capacitors are connected in parallel in a circuit, the total capacitance is
(Note: CT = C1+C2+C3...)
equal to the sum of all the capacitances
19
when the inductors are connected in sereis in a circuit, the total inductance (where the magenetic fields of each inductor do not affect the others) is
Note: LT = L1+L2+L3...
equal to the sum of the individual inductances
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