Multiple Choice ONLINE MCQ EE AND ECE–Thyristors (SCR) Part Two

1. An SCR is made of silicon and not germanium because silicon ….
(1) is inexpensive
(2) is mechanically strong
(3) has small leakage current
(4) is tetravalent

Answer

2. An SCR is a solid state equivalent of …
(1) Triode
(2) Pentode
(3) Gas-filled triode
(4) Tetrode

Answer

3. An SCR behaves as a …………… switch
(1) Unidirectional
(2) Bidirectional
(3) Mechanical
(4) None of the above

Answer

4. An SCR has three terminals viz. …
(1) cathode, anode, gate
(2) anode, cathode, grid
(3) anode, cathode, drain
(4) none of the above

Answer

5. An SCR is made of
(1) Germanium
(2) Silicon
(3) Carbon
(4) None of the above

(a) 1 only
(b) 2 only
(c) 1 & 2 only
(d) 1,2,3 only

Answer

6. An SCR is also known as
(1) Triac
(2) Diac
(3) Unijunction transistor
(4) Thyristor

Answer

7. In the normal operation of an SCR, anode is …….. with respect to cathode
(1) at zero potential
(2) negative
(3) positive
(4) none of the above

Answer

8. An SCR combines the features of ……..
(1) a rectifier and resistance
(2) a rectifier and transistor
(3) a rectifier and capacitor
(4) none of the above

Answer

9. In normal operation of an SCR, gate is ………. with respect to cathode
(1) positive
(2) negative
(3) at zero potential
(4) none of the above

Answer

10. When SCR is OFF, the current in the circuit is ………
(1) exactly zero
(2) small leakage current
(3) large leakage current
(4) none of the above

Answer

11. The control element in an SCR is …….
(1) cathode
(2) anode
(3) anode supply
(4) gate

Answer

12. The normal way to turn on an SCR is by…….
(1) Breakover voltage
(2) Appropriate anode current
(3) Appropriate gate current
(4) None of the above

Answer

13. An SCR is turned off by ……..
(1) Reducing anode voltage to zero
(2) Reducing gate voltage to zero
(3) Reverse biasing the gate
(4) None of the above

Answer 

Thyristors (SCR) Part One 

ONLINE MCQ EE AND ECE-A.C. Fundamentals, Circuits and Circuit Theory Part One
Multiple Choice ONLINE MCQ EE AND ECE--Thyristors (SCR) Part One

Leave a Reply