WorksheetsAnalog Circuits
Total questions: 21
Worksheet time: 11mins
what is a diodes function
allows current to flow in one direction
allows current to flow in two directions
is a resistor
when a Diode is used as a half wave rectifier ....
It rectifies only one half of the input AC signal
It rectifies both the halves of the input AC signal
Which image shows the output of a sine-wave after it has gone through a diode? (Half-wave rectified)
What electrical component is used to smooth half wave current signals?
Resistor
Diode
Capacitor
Voltage regulator
halfwave rectified
fullwave rectified
sine wave
light bulb
The function of rectifier is
To increase or decrease the AC voltage in a circuit
Converting the AC voltage into pulse DC voltage
Smooth out the ripple contained in the pulses of pulse DC voltage
Maintain a constant DC voltage output across a load
The number of diodes used to build a bridge rectifier
1
2
3
4
A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as a DC source. To overcome this one can use
A capacitor in series with a the load resistance
A capacitor in parallel to the load resistance
Both of the mentioned situations will work
None of the mentioned situations will work
The basic purpose of a filter is to
Minimize variations in a.c. input signal.
Suppress harmonics in rectified output.
Remove ripples from the rectified output
Stabilize d.c. output voltage
THE CIRCUIT WHICH CONVERTS AC TO DC IS CALLED __________________.
REGUALTOR.
RECTIFIER.
STABILIZER.
NONE OF THE ABOVE.
What is the type of transistor shown in the diagram below?
𝑝𝑛𝑝
𝑛𝑝𝑛
𝑛𝑛𝑝
𝑝𝑝𝑛
𝑝𝑝𝑝
What type of diode circuit is used to clip off portions of signal voltages above or below certain levels?
clipper or limiter
clamper
voltage regulator
none of the above
The clipping action of a diode requires that its forward resistance:
Be zero
Have a finite value
Be infinite
None of the above
Which of the following is true for an npn or pnp transistor?
IE = IB + IC
IB = IC+ IE
IC = IB + IE
none of these
