NEW
Font size
WorksheetsIntroduction of Power Electronic Devices
Total questions: 17
Worksheet time: 10mins
SCR is defined as ...............
Silicone Cup Rectifier
Supply Controlled Rectifier
Silicone Controlled Rectifier
Shorted Controlled Rectifier
Which is the symbol of SCR?
Terminals of SCR are ..........
Anode and Cathode
Collector, Base and Emitter
Anode, Cathode and Gate
Drain, Source and Gate
Power Electronics can be defined as ...........
A conversion from Alternating Current to Direct Current of Power Supply
A conversion of DC power supply to AC power supply
A conversion of AC power supply to AC power supply
A technology of converting electric power from one supply to another supply using electronic power devices.
The electronic devices below are unidirectional devices EXCEPT:
TRIAC
Diode
Silicone Controlled Rectifier
Diode pass ......... in one direction?
a) Voltage
b) Current
c) Both
d) None of these
A silicon controlled rectifier (SCR) is a_______
Unijunction device
Device with three junction
Device with four junction
None of the above
A thyristor is basically_____
PNPN device
A set of SCRs
A combination of diac and triac
A set of SCR, diac and a triac
If holding current of a thyristor is 2 mA then latching current should be____
0.02
0.001
0.004
0.002
SMPS is used for
obtaining controlled ac power supply
switch from one source to another
storage of dc power
obtaining controlled dc power supply
Power converters can change one form of power to another form of power using semiconductor power devices.
True
False
To switch on BJT, current must be applied into terminal ................... of BJT
Collector
Emitter
Gate
Base
To switch on SCR need ......
Positive Vgt
Negative Vgt
Base current
Collector current
Current from terminal G will flow to terminal ............ T2, and ............... current from T2 will flow to terminal base T1
collector, emitter
base, collector
base, base
collector, base
