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WorksheetsElectronics Quiz
Total questions: 20
Worksheet time: 40mins
Efficiency of a half wave rectifier is
50%
60%
40.6%
46%
If peak voltage for a half wave rectifier circuit is 5V and diode cut in voltage is 0.7, then peak inverse voltage on diode will be?
5V
4.9V
4.3V
6.7V
Transformer utilisation factor of a half wave rectifier is _________
0.234
0.279
0.287
0.453
If the input frequency of a half wave rectifier is 100Hz, then the ripple frequency will be_________
150Hz
200Hz
100Hz
300Hz
Ripple factor of a half wave rectifier is_________(Im is the peak current and RL is load resistance)
1.414
1.21
1.4
0.48
Efficiency of a centre tapped full wave rectifier is _________
50 %
40 %
46 %
70 %
81.2 %
In a centre tapped full wave rectifier, RL=1KΩ and for diode Rf=10Ω. The primary voltage is 800sinωt with transformer turns ratio=2. The ripple factor will be _________
54 %
48 %
26 %
81 %
If input frequency is 50Hz for a full wave rectifier, the ripple frequency of it would be _________
100 hz
50 hz
25 hz
500 hz
In the circuits given below, the correct full wave rectifier is _________
If the peak voltage on a centre tapped full wave rectifier circuit is 5V and diode cut in voltage is 0.7. The peak inverse voltage on diode is_________
4.3 v
9.3 v
5.7 v
10.7 v
In a centre tapped full wave rectifier, the input sine wave is 250sin100t. The output ripple frequency will be _________
50 hz
100 hz
25 hz
200 hz
Which of the following is not a property of an ideal operational amplifier?
Zero input impedance
Infinite bandwidth
Infinite open loop gain
Zero common-mode gain or conversely infinite common mode-rejection.
Consider the figure given below. Known that vo = 4V and vi = 2V, determine the gain for the op amp assuming that it is ideal except for the fact that it has finite gain
1001
2002
3003
4004
Which of the following is not a terminal for the operational amplifier?
Inverting terminal
Non-inverting terminal
Output terminal
None of the mentioned
Express the input voltages v1 and v2 in terms of differential input (vd) and common-mode input(vc). Given v2 > v2.
Vd = V1 – V2, Vc = 0.5(V1 + V2)
Vd = V2 – V1, Vc = V1 + V2
Vd = V1 – V2, Vc = V1 + V2
Vd = V2 – V1, Vc = 0.5(V1 + V2)
What are the units of slew rate?
Second/Volt
Volt/second
It is a ratio, no units
Ohm/second
In an NPN transistor, the arrow is pointed towards_________
the collector
the base
depends on the configuration
the emitter
Which of the following are true for a PNP transistor?
the emitter current is less than the collector current
the collector current is less than the emitter current
the electrons are majority charge carriers
the holes are the minority charge carriers
When does the transistor act like an open switch?
cut off region
inverted region
saturated region
active region
If the emitter-base junction is forward biased and the collector-base junction is reverse biased, what will be the region of operation for a transistor?
cut off region
saturated region
inverted region
active region
