1
|
State the full
form of the TRIAC.
|
|
Triode AC
switch
|
2
|
Why the Triac
is called as bidirectional?
|
|
The conduction
of the triac is done either polarity of the supply voltage therefore it is
called as bidirectional.
|
3
|
How many
terminals the Triac consists of?
|
|
Three : MT1,
MT2 and gate
|
4
|
Which
semiconductor device requires more gate current in order to turn it on? Triac OR SCR
|
|
SCR
|
5
|
Whether the Triac
is turned on by positive gate current or negative gate current?
|
|
Either
positive or negative gate current
|
6
|
Give reason :
The Triac is rarely operated in the first quadrant with negative gate current
and third quadrant with positive gate current.
|
|
Due to less
sensitive
|
7
|
In which
quadrant of the operation, the Triac has greatest sensitivity?
|
|
First quadrant
with gate positive gate current and third quadrant with negative gate
current.
|
8
|
State the
advantages and disadvantages of the Triac.
|
|
Advantages
of the Triac
- Bidirectional
- Only single
fuse requires for protection
- The Triac
requires only one heat sink of larger size whereas the two anti parallel SCRs
requires two heat sink of smaller size.
Disadvantages
of the Triac
- Low rating as
compared to SCR
- Less reliable
- Low dv / dt as
compared to SCR
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