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WorksheetsPower Electronic TEST
Total questions: 20
Worksheet time: 19mins
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
conductor
semiconductor
insulator
diode
what is the meaning of rectification?
a process of smoothing using a capacitor
a process of converting an alternating current into a direct current by using a diode.
a process of converting a direct current into an alternating current by using a diode.
The diagram shown as a process of?
a half wave rectification
a full wave rectification
a full bridge rectification
This is a graph that is seen on CRO. How is it change after full wave rectification process?
is at is diode function?
is a resistor
allow current to flow into one direction
allow current to flow into two direction
is converting Direct current to AC current
The number of diodes used to build a bridge rectifier?
1
2
3
4
The applied input a.c. power to a half-wave rectifier is 100 watts. The d.c. output power obtained is 40 watts. What is the rectification efficiency ?
40 %
50%
60%
100%
[15 minutes] What is the duty cycle of a chopper
Ton/Toff
TonxToff
T/Toff
Ton/T
What is the function of dc chopper
convert DC to AC
convert DC to DC
convert AC to DC
convert Ac to Ac
The semiconductor devices can be used as a switch in DC chopper except
diode
iGBT
MOSFET
BJT
The output voltage, Vo of step down chopper must ________than input voltage.
more
less
equal
slower
. Choose the correct diagram for boost converter
In Half bridge inverter output voltage equals to
Vo = Vs
Vo = Vs/2
Vo =1/ Vs
Vo = 2Vs
In full bridge inverter output voltage equals to
Vo = Vs
Vo = Vs/2
Vo = 2Vs
Vo = 1/Vs
Inverter is convert from
AC to AC
DC to AC
DC to DC
AC to DC
A single full bridge Inverters require
4 SCRs and 2 diode
4 diode and 4 SCRs
4 Diode and 2 SCRs
2 SCRs and 2 Diode
Which is Single Phase Cycloconverter?
An Electrical machine which converts mechanical energy to electrical energy is called as
Motor
Generator
transformer
capacitor
Rotor is also called as
stator
armature
comutator
brusher
If slip value is less than 1, it means, the machine is
motor
generator
braking
transferring
