To retain its charge, the capacitor in a
simple capacitor filter must have a long
charge time constant and a short
discharge time constant.
If the capacitance in a circuit increases,
XC, will increase.
To provide a steady dc output in a
simple capacitor circuit, the capacitor
must charge almost instantaneously to
the value of the applied voltage.
What is the most basic type of filter?
2. LC choke input
3. LC capacitor input
4. RC capacitor input
In a circuit with a capacitor filter, how
is the capacitor connected?
1. In series with the load
2. In parallel with the load
3. In parallel with the output
4. Both 2 and 3 above
Which, if any, of the following factors
determines the rate of discharge of the
capacitor in a filter circuit?
1. The value of the load resistance
2. The amount of voltage
3. The type of capacitor
4. None of the above
A half-wave rectifier has an output
frequency of 60 hertz, a filter capacitor
value of 40 microfarads, and a load
resistance of 10 kilohms. What is the
value of XC?
1. 132.51 ohms
2. 66.25 ohms
3. 33.13 ohms
4. 16.57 ohms
A full-wave rectifier has an output
frequency of 120 hertz, a filter
capacitor value of 25 microfarads, and
a load resistance of 10 kilohms. What is
the value of XC?
1. 5.3 ohms
2. 53 ohms
3. 106 ohms
4. 1060 ohms
The LC choke-input filter is used
primarily where which of the following
types of regulation is/are important?
2. Current only
3. Voltage only
4. Voltage and current
In an LC choke-input filter circuit, the
capacitor charges only to the average
value of the input voltage. Which of the
following components inhibits the
capacitor from reaching the peak value
of the input voltage?
3. Filter choke
4. Load resistor