We can control a.c. power in a load by connecting ______________?

Related Mcqs:

1. An SCR is a solid state equivalent of ______________?

   A. Triode
   B. Pentode
   C. Gas-filled triode
   D. Tetrode

2. The control element of an SCR is ______________?

   A. Cathode
   B. Anode
   C. Anode supply
   D. Gate

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

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

4. 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

5. An SCR is made of_______________?

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

6. An SCR is sometimes called ____________?

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

7. 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

8. 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

9. 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

10. 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