A
resistor is in series with a 2.2 
F capacitor. The time constant is
-
48 s -
480 s -
2.42 s -
24 s
When the voltage across a capacitor is tripled, the stored charge
-
triples -
is cut to one-third -
stays the same -
doubles
When the plate area of a capacitor increases,
-
the capacitance increases -
the capacitance decreases -
the capacitance is unaffected -
the voltage it can withstand increases.
AkHz voltage is applied to a 0.F capacitor, andmA of rms current is measured. What is the value of the voltage?
-
8 V -
80 V -
80 mV -
800 mV
When the plate area of a capacitor increases,
-
the capacitance increases -
the capacitance decreases -
the capacitance is unaffected -
the voltage it can withstand increases.
What is the capacitance when Q =C and V =V?
-
720 F -
5 F -
50 F -
12 F
A resistor is in series with a 2.2 F capacitor. The time constant is
-
48 s -
480 s -
2.42 s -
24 s
A resistor is in series with a 2.2 F capacitor. The time constant is
-
48 s -
480 s -
2.42 s -
24 s
AkHz voltage is applied to a 0.F capacitor, andmA of rms current is measured. What is the value of the voltage?
-
8 V -
80 V -
80 mV -
800 mV
What is the capacitance when Q =C and V =V?
-
720 F -
5 F -
50 F -
12 F
Five time constants are required for a capacitor to charge fully or discharge fully.
-
True -
False
XC is inversely proportional to frequency and capacitance.
-
True -
False
The ohm is the unit of capacitance.
-
True -
False
Capacitance is directly proportional to plate area and plate separation.
-
True -
False
Voltage leads current byin a capacitor.
-
True -
False
The true power in a capacitor is zero.
-
True -
False
A capacitor blocks ac but passes dc.
-
True -
False
The dielectric constant is the ability of a material to establish an electric field.
-
True -
False
Total parallel capacitance is less than that of the smallest capacitor in parallel.
-
True -
False
Energy is stored by a capacitor in a magnetic field.
-
True -
False