Q.1
XC is inversely proportional to frequency and capacitance.
Q.2
Two series capacitors (one 2 µF, the other of unknown value) are charged from a 24 V source. The 2 µF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is
Q.3
A 0.00022 F capacitor equals how many micro-farads?
Q.4
Energy is stored by a capacitor in a magnetic field.
Q.5
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
Q.6
A 4.7 MΩ resistor is in series with a 0.015 µF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
Q.7
A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
Q.8
Four 0.15 µF capacitors are in parallel. The total capacitance is
Q.9
When the voltage across a capacitor is tripled, the stored charge
Q.10
Of the following capacitors, which one has the highest dielectric constant?
Q.11
A 12 kHz voltage is applied to a 0.33 µF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
Q.12
When the plate area of a capacitor increases,
Q.13
The ohm is the unit of capacitance.
Q.14
Capacitance is directly proportional to plate area and plate separation.
Q.15
An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
Q.16
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
Q.17
The dielectric constant is the ability of a material to establish an electric field.
Q.18
A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than
Q.19
Which of the following capacitors is polarized?
Q.20
A capacitor of 0.02 µF is larger than
0 h : 0 m : 1 s