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

Related Mcqs:

1. In the normal operation of an SCR, anode is __________ w.r.t. cathode?

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

2. 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

3. 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

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. An SCR can exercise control over____________of a.c. supply?

   A. Positive half-cycles only
   B. Negative half-cycles only
   C. Both positive and negative half-cycles
   D. Positive or negative half-cycles

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 is made of_______________?

   A. Germanium
   B. Silicon
   C. Carbon
   D. None of the above

8. An SCR behaves as a____________switch?

   A. Unidirectional
   B. Bidirectional
   C. Mechanical
   D. None of the above

9. An SCR is made of silicon and not germanium because silicon _________________?

   A. Is inexpensive
   B. Is mechanically strong
   C. Has small leakage current
   D. Is tetravalent

10. An SCR is a ____________ triggered device?

    A. Voltage
    B. Current
    C. Voltage as well as current
    D. None of the above