Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Consider the following devices:1. TRIAC2. GTO...
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Consider the following devices:
1. TRIAC
2. GTO
3. BJT
4. MOSFET
5. DIAC
Which of these devices does not belong to the family of thyristors?
1. TRIAC
2. GTO
3. BJT
4. MOSFET
5. DIAC
Which of these devices does not belong to the family of thyristors?
- a)1 and 2 only
- b)3 and 4 only
- c)1, 2, 3, 4 and 5
- d)3, 4 and 5 only
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following devices:1. TRIAC2. GTO3. BJT4. MOSFET5. DIACWhi...
The P-N-P-N devices with zero, one or two gates constitute the basic thyristor. But with the advancement in technology thyristor family includes other similar multilayer devices also.
Devices in Thyristor family:
The following symbols represent DIAC, SCR, TRIAC, and GTO respectively.
- The most important member is SCR (silicon-controlled rectifier); It is a four-layer (P-N-P-N), three junction semiconductor devices with three terminals, namely, the anode, the cathode, and the gate; It is a unidirectional device
- DIAC and TRIAC are bidirectional devices, The DIAC is a two-terminal, three-layer device and is commonly used for triggering TRIACs; The TRIAC is a 3-terminal semiconductor device and may be considered equivalent to two SCRs connected in antiparallel
- A gate turn-off thyristor (GTO) is a special type of thyristor, which is a high-power semiconductor device; Normal thyristors (silicon-controlled rectifiers) are not fully controllable switches but GTO can be Turned ON as well as Turned OFF using Gate signal
- A bipolar junction transistor (bipolar transistor or BJT) is a type of transistor that uses both electrons and holes as charge carriers; BJTs can be used as amplifiers or switches
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Consider the following devices:1. TRIAC2. GTO3. BJT4. MOSFET5. DIACWhi...
Introduction:
In electrical engineering, thyristors are a family of semiconductor devices that exhibit bistable behavior. Thyristors are widely used in various applications such as power control, motor control, and electronic switching. This question asks us to identify the device that does not belong to the family of thyristors among TRIAC, GTO, BJT, MOSFET, and DIAC.
Explanation:
Here, we will discuss each device and its characteristics to determine whether it belongs to the thyristor family or not.
1. TRIAC:
- TRIAC is a bidirectional device that can conduct current in both directions.
- It is a member of the thyristor family and is commonly used for AC power control applications.
- TRIACs are widely used in dimmer switches, motor speed control, and light dimming applications.
2. GTO (Gate Turn-Off Thyristor):
- GTO is a type of thyristor that can be turned off by applying a negative voltage to its gate terminal.
- It is a member of the thyristor family and is commonly used in high-power applications.
- GTOs are used in high-power inverters, motor drives, and traction systems.
3. BJT (Bipolar Junction Transistor):
- BJT is a three-layer semiconductor device that can amplify or switch electronic signals and power.
- It is not a member of the thyristor family.
- BJTs are commonly used in amplifiers, switches, and digital logic circuits.
4. MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor):
- MOSFET is a type of field-effect transistor that uses an insulated gate to control the flow of current.
- It is not a member of the thyristor family.
- MOSFETs are widely used in power amplifiers, switching regulators, and digital circuits.
5. DIAC (Diode Alternating Current):
- DIAC is a two-terminal device that can switch AC current in both directions.
- It is not a member of the thyristor family.
- DIACs are commonly used in triggering TRIACs and other thyristor-based devices.
Conclusion:
Based on the characteristics and properties of each device, we can conclude that the BJT (Bipolar Junction Transistor) and MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) do not belong to the family of thyristors. Therefore, the correct answer is option 'b) 3 and 4 only'.
In electrical engineering, thyristors are a family of semiconductor devices that exhibit bistable behavior. Thyristors are widely used in various applications such as power control, motor control, and electronic switching. This question asks us to identify the device that does not belong to the family of thyristors among TRIAC, GTO, BJT, MOSFET, and DIAC.
Explanation:
Here, we will discuss each device and its characteristics to determine whether it belongs to the thyristor family or not.
1. TRIAC:
- TRIAC is a bidirectional device that can conduct current in both directions.
- It is a member of the thyristor family and is commonly used for AC power control applications.
- TRIACs are widely used in dimmer switches, motor speed control, and light dimming applications.
2. GTO (Gate Turn-Off Thyristor):
- GTO is a type of thyristor that can be turned off by applying a negative voltage to its gate terminal.
- It is a member of the thyristor family and is commonly used in high-power applications.
- GTOs are used in high-power inverters, motor drives, and traction systems.
3. BJT (Bipolar Junction Transistor):
- BJT is a three-layer semiconductor device that can amplify or switch electronic signals and power.
- It is not a member of the thyristor family.
- BJTs are commonly used in amplifiers, switches, and digital logic circuits.
4. MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor):
- MOSFET is a type of field-effect transistor that uses an insulated gate to control the flow of current.
- It is not a member of the thyristor family.
- MOSFETs are widely used in power amplifiers, switching regulators, and digital circuits.
5. DIAC (Diode Alternating Current):
- DIAC is a two-terminal device that can switch AC current in both directions.
- It is not a member of the thyristor family.
- DIACs are commonly used in triggering TRIACs and other thyristor-based devices.
Conclusion:
Based on the characteristics and properties of each device, we can conclude that the BJT (Bipolar Junction Transistor) and MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) do not belong to the family of thyristors. Therefore, the correct answer is option 'b) 3 and 4 only'.
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