WorksheetsSCR Quiz
Total questions: 10
Worksheet time: 5mins
The SCR is a __________ controlled device.
Current
Voltage
Power
Frequency
The number of PN junctions in an SCR is:
1
2
3
4
Which region of an SCR is most sensitive to gate triggering?
Anode region
Cathode region
Junction J2 region
Middle region
The SCR can be turned off by:
Increasing gate current
Reversing anode voltage
Reducing load
Applying reverse bias across J2
The holding current of an SCR is:
The maximum current that keeps it OFF
The minimum current to keep it ON
The maximum gate current
The leakage current
In an SCR, latching current is:
Greater than holding current
Equal to holding current
Less than holding current
Unrelated to holding current
An SCR is mainly used in:
Rectification only
Amplification
Power control
Signal processing
The forward blocking state of SCR exists when:
Anode is negative w.r.t cathode
Anode is positive, but gate current is absent
Both anode and gate are positive
Cathode is positive
Which method cannot be used to turn off an SCR?
Forced commutation
Natural commutation
Applying positive gate current
Reverse biasing
The device that is similar to an SCR but can conduct in both directions is:
TRIAC
DIAC
MOSFET
GTO
