1. . A thyristor (SCR) is a
(A) P-N-P device
(B) P-N-P-N device
(C) N-P-N device
(D) P-N device
2. . A ______________ is a solid-state semiconductor device with four layers of alternating P- and N-type materials.
(A) Thyristor
(B) Resistive Loads
(C) Transistors
(D) None of the above
3. . SCR stands for?
(A) source-controlled rectifier
(B) source-current rectifier
(C) silicon-controlled rectifier
(D) silicon-current rectifier
4. . The thyristor is a ________ layered, _______ terminal semiconductor device, with each layer consisting of alternately N-type or P-type material
(A) 3, 4
(B) 4, 3
(C) 4, 4
(D) 3, 3
5. . SCR is a __________ device
(A) Uncontrolled
(B) Voltage
(C) Semi-controlled
(D) Fully controlled
6. . The static V-I curve for the SCR is plotted for
(A) IavsVa with Ig as a parameter
(B) Ia (anode current) vs Ig (gate current), Va (anode – cathode voltage) as a parameter
(C) VavsIg with Ia as a parameter
(D) Ig vs Vg with Ia as a parameter
7. . Which terminal does not belong to the SCR?
(A) Base
(B) Gate
(C) Anode
(D) Cathode
8. . A Triac is a ______________?
(A) 2 terminal switch
(B) 2 terminal bilateral switch
(C) 3 terminal bilateral switch
(D) 3 terminal bidirectional switch
9. . The normal way to turn on a diac is by
(A) Gate current
(B) None of the above
(C) Either of the above
(D) Breakover voltage
10. . Diac has ………….. terminals
(A) None of the above
(B) Three
(C) Four
(D) Two