When the voltage across a capacitor is tripled, the stored charge
When the voltage across a capacitor is tripled, the stored charge
The ohm is the unit of capacitance.
The ohm is the unit of capacitance.
Of the following capacitors, which one has the highest dielectric constant?
Of the following capacitors, which one has the highest dielectric constant?
Which of the following capacitors is polarized?
Which of the following capacitors is polarized?
Capacitance is directly proportional to plate area and plate separation.
Capacitance is directly proportional to plate area and plate separation.
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?
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?
A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is
A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is
A capacitor of 2,000 pF is greater than
A capacitor of 2,000 pF is greater than
When the plate area of a capacitor increases,
When the plate area of a capacitor increases,
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
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
XC is inversely proportional to frequency and capacitance.
XC is inversely proportional to frequency and capacitance.
A capacitor blocks A.C. but passes D.C.
A capacitor blocks A.C. but passes D.C.
Total parallel capacitance is less than that of the smallest capacitor in parallel.
Total parallel capacitance is less than that of the smallest capacitor in parallel.
The true power in a capacitor is zero.
The true power in a capacitor is zero.
A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is
A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is
Five time constants are required for a capacitor to charge fully or discharge fully.
Five time constants are required for a capacitor to charge fully or discharge fully.
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
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
The dielectric constant is the ability of a material to establish an electric field.
The dielectric constant is the ability of a material to establish an electric field.
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
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
Energy is stored by a capacitor in a magnetic field.
Energy is stored by a capacitor in a magnetic field.
A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than
A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than
A capacitor of 0.02 µF is larger than
A capacitor of 0.02 µF is larger than
A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
A 0.00022 F capacitor equals how many micro-farads?
A 0.00022 F capacitor equals how many micro-farads?
Voltage leads current by 90° in a capacitor.
Voltage leads current by 90° in a capacitor.
A 0.01 µF capacitor equals how many picofarads?
A 0.01 µF capacitor equals how many picofarads?
What is the capacitance when Q = 60 µC and V = 12 V?
What is the capacitance when Q = 60 µC and V = 12 V?
Four 0.15 µF capacitors are in parallel. The total capacitance is
Four 0.15 µF capacitors are in parallel. The total capacitance is
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?
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?
