Discussion
UJT is often used in power controlling circuits because of :
Answer: A
The UJT is used because of its excellent triggering properties.
A UJT switches on sharply when its emitter voltage reaches the peak point, discharging a capacitor in a fast pulse. This makes the UJT relaxation oscillator a simple, stable source of sharp trigger pulses for firing SCRs and triacs in power control circuits.
The UJT is a low-power device, so high power dissipation and high current supply are not its virtues; it is used to trigger the power devices, not to handle power itself. A large breakdown voltage is not the reason it is chosen.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development