WorksheetsElectronics Club Quiz 2020-21
Total questions: 20
Worksheet time: 11mins
An ideal diode conduct when it is
reverse biased
forward biased
both forward and reverse biased
reverse biased above 1V
Efficiency of a half wave rectifier is
50%
60%
40.6%
46%
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 %
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
Zener diode acts as a
rectifier
voltage regulator
potentiometer
galvanometer
Identify the electronic symbol.
Diode
Photodiode
Reflective diode
Light Emitting Diode
What electronic component allows current to flow in one direction only?
Resistor
LED
Diode
Switch
Which of the following is the correct transistor circuit symbol?
What is this?
Television
Pot?
LDR
Resistor?
what is an oscillator?
an amplifier
a power supply
a multimeter
a signal generator
