MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The TRIAC can be represented by |
| A. | two SCRs in anti-parallel |
| B. | two SCRs in parallel |
| C. | two diodes in anti-parallel |
| D. | two diodes in parallel |
| Answer» B. two SCRs in parallel | |
| 2. |
The DIAC can be represented by |
| A. | two SCRs in anti-parallel |
| B. | two SCRs in parallel |
| C. | two diodes in anti-parallel |
| D. | two diodes in parallel |
| Answer» D. two diodes in parallel | |
| 3. |
Which of the following devices provide complete isolation between triggering circuit and power circuit? |
| A. | PUT |
| B. | LASCR |
| C. | SUS |
| D. | DIAC |
| Answer» C. SUS | |
| 4. |
The SCS (Silicon Controlled Switch) can be turned on by two methods, by applying __________ and __________ |
| A. | positive pulse to the anode gate, positive pulse to the cathode gate |
| B. | positive pulse to the anode gate, negative pulse to the cathode gate |
| C. | negative pulse to the anode gate, positive pulse to the cathode gate |
| D. | negative pulse to the anode gate, negative pulse to the cathode gate |
| Answer» D. negative pulse to the anode gate, negative pulse to the cathode gate | |
| 5. |
The SCS is a four layer, four terminal thyristor. Can be turned on by |
| A. | the anode gate |
| B. | the cathode gate |
| C. | either of the gates |
| D. | gating both the gates together |
| Answer» D. gating both the gates together | |
| 6. |
The SCS (Silicon Controlled Switch) is a |
| A. | two terminal device |
| B. | three terminal device |
| C. | four terminal device |
| D. | five terminal device |
| Answer» D. five terminal device | |
| 7. |
From the following list of devices, choose the device that only turns-on for a fixed-value of anode-cathode voltage |
| A. | PUT |
| B. | SCR |
| C. | SUS |
| D. | BJT |
| Answer» D. BJT | |
| 8. |
The equivalent circuit of SUS (Silicon Unilateral Switch) consists of |
| A. | a diode in series with a PUT |
| B. | a diode in parallel with a PUT |
| C. | a diode in anti-parallel with a PUT |
| D. | two diodes |
| Answer» D. two diodes | |
| 9. |
The Programmable Unijunction Transistor (PUT) turns on & starts conducting when the |
| A. | gate voltage exceeds anode voltage by a certain value |
| B. | anode voltage exceeds gate voltage by a certain value |
| C. | gate voltage equals the anode voltage |
| D. | gate is given negative pulse w.r.t to cathode |
| Answer» C. gate voltage equals the anode voltage | |
| 10. |
_________ device from the thyristor family has its gate terminal connected to the n-type material near the anode. |
| A. | SCR |
| B. | RCT |
| C. | PUT |
| D. | SUT |
| Answer» D. SUT | |