? is the opposition to AC current flow caused by a capacitor.
a.
Capacitance
b.
Capacitive reactance
c.
Impedance
d.
Reactance
The correct answer is: Capacitive reactance
The unit of measure for capacitive reactance is the ? .
a.
farad
b.
henry
c.
hertz
d.
ohm
The correct answer is: ohm
? is the opposition offered to the flow of current by the reaction of a capacitor.
a.
Capacitance
b.
Capacitive reactance
c.
Impedance
d.
Reactance
The correct answer is: Capacitive reactance
? is the abbreviation for capacitive reactance.
a.
C
b.
X
c.
X
d.
Z
The correct answer is: X
Drag the terms below to the appropriate locations to create the formula to find capacitive reactance. Be sure to place the variable of the item you are solving for on the
left.
no answer
When using the formula for calculating capacitive reactance, the frequency must be
expressed in hertz and the capacitance in ? .
a.
amps
b.
farads
c.
henries
d.
ohms
The correct answer is: farads
400 kilohertz = ? hertz
The correct answer is: 400000
30 microfarads = ? farads.
The correct answer is: 0.00003
200 picofarads = ? farads
The correct answer is: 0.0000000002
Select the correct option to complete the following sentences.
If the capacitance of a capacitive circuit is ? , the capacitive
reactance is increased.
If the frequency of a capacitive circuit is ? , the capacitive reactance is decreased.
Possible answers
increased
decreased
decreased
increased
A 200 µF capacitor is connected to a 60-hertz source. What is its capacitive reactance?
(Round the FINAL answer to one decimal place.)
The correct answer is: 13.3 Ω
How much current flows in a 240-volt, 400-hertz circuit that is connected to a 50-
microfarad capacitor? (Round the FINAL answer to the nearest whole number.)
The correct answer is: 30 A
What is the capacitive reactance of a 200-picofarad capacitor when connected to a 700-
kilohertz, 500-volt source? (Round the FINAL answer to the nearest whole number.)
The correct answer is: 1137 Ω
Solve for the capacitive reactance and the capacitance in the circuit shown. (Round the
FINAL answers to at least two decimal places in the specified unit.)
X = ? Ω
C = ? µF
The correct answer is: 120 Ω
The correct answer is: 22.1 µF
Solve for the capacitive reactance and the total current in the circuit shown. (Round the
FINAL answers to at least two decimal places in the specified unit.)
X = ? Ω
I = ? A
The correct answer is: 79.6 Ω
The correct answer is: 1.5 A
Solve for the capacitive reactance and the capacitance in the circuit shown. (Round the
FINAL answers to at least two decimal places in the specified unit.)
X = ? Ω
C = ? µF
The correct answer is: 60 Ω
The correct answer is: 2.65 µF
In this circuit, It = 0.05 A, C = 0.5 µF, and Xc = 100Ω. Solve for Es
Answer:
The correct answer is: 5 V
In this circuit, It = 0.05 A, C = 0.5 µF, and Xc = 100Ω. Solve for f. (Round the FINAL answer to the nearest whole number.)
Answer:
Hz
The correct answer is: 3185
The capacitive reactance of a 240-volt, 60-hertz circuit is 30 ohms. What is the current
flow?
Answer:
The correct answer is: 8 A
Solve for the capacitive reactance and the total current in the circuit shown if the
frequency is 200 hertz. Then calculate the values again at 60 hertz. (Round the FINAL
answers to at least two decimal places in the specified unit.)
Xc@200hz = ? Ω
It@200hz = ? mA
Xc@60hz = ? Ω
It@60hz = ? mA
The correct answer is: 1693 Ω
The correct answer is: 3.54 mA
The correct answer is: 5644 Ω
The correct answer is: 1.06 mA
Current flows through a capacitor because of the increase and decrease of voltage and change in the direction of current.
Select one:
True
False
The correct answer is 'False'.
In a charged capacitor, the voltage across the plates of the capacitor opposes the applied voltage.
Select one:
True
False
The correct answer is 'True'.
In reality, in a capacitive AC circuit, current only flows back and forth as a result of the increase and decrease in voltage and the change in ? .
a.
capacitive reactance
b.
current
c.
frequency
d.
polarity
The correct answer is: polarity
The current flow in a pure capacitive circuit leads the applied voltage by ? .
a.
60°
b.
90°
c.
120°
d.
270°
The correct answer is: 90°
Select the correct option to complete the following sentences.
If the frequency of a capacitive circuit ? , the current is
increased.
If the voltage of a capacitive circuit ? , the current is
increased.
possible answers
is increased
is decreased
is increased
is increased
Current through a capacitive circuit is ? proportional to the frequency and ?
proportional to the voltage.
a.
directly / directly
b.
directly / inversely
c.
inversely / directly
d.
inversely / inversely
The correct answer is: directly / directly