An SCR is a ____________ triggered device?

Related Mcqs:

1. An SCR is sometimes called ____________?

   A. Triac
   B. Diac
   C. Unijunction transistor
   D. Thyristor

2. An SCR combines the features of ____________?

   A. A rectifier and resistance
   B. A rectifier and transistor
   C. A rectifier and capacitor
   D. None of the above

3. When SCR starts conducting, then _____________ loses all control?

   A. Gate
   B. Cathode
   C. Anode
   D. None of the above

4. If firing angle in an SCR circuit is increased, the output _____________?

   A. Remains the same
   B. Is increased
   C. Is decreased
   D. None of the above

5. If gate current is increased, then anode-cathode voltage at which SCR closes_________________?

   A. Is decreased
   B. Is increased
   C. Remains the same
   D. None of the above

6. An SCR is turned off when ________________?

   A. Anode current is reduced to zero
   B. Gate voltage is reduced to zero
   C. Gate is reverse biased
   D. None of the above

7. An SCR has __________ pn junctions?

   A. Two
   B. Three
   C. Four
   D. None of the above

8. In normal operation of an SCR, gate is _____________w.r.t. cathode?

   A. Positive
   B. Negative
   C. At zero potential
   D. None of the above

9. The normal way to turn on a SCR is by______________?

   A. Breakover voltage
   B. Appropriate anode current
   C. Appropriate gate current
   D. None of the above

10. In an SCR circuit the supply voltage is generally ___________ that of breakover voltage?

    A. Equal to
    B. Less than
    C. Greater than
    D. None of the above