16. The ________ the anode gate current, the ________ the required anode-to-cathode voltage to turn the SCS device on.
(a) higher, higher
(b) lower, lower
(c) higher, lower
(d) None of the above
17. The peak and valley currents of the PUT are typically ________ those of a similarly rated UJT.
(a) lower than
(b) the same as
(c) higher than
(d) None of the above
18. The minimum operating voltage of the UJT is typically ________ that of a similarly rated PUT.
(a) lower than
(b) the same as
(c) higher than
(d) None of the above
19. A thyristor is a ________-layer semiconductor material device.
(a) 2
(b) 3
(c) 4
(d) 5
20. Which of the following devices has (have) four layers of semiconductor materials?
(a) Silicon-controlled switch (SCS)
(b) Gate turn-off switch (GTO)
(c) Light-activated silicon-controlled rectifier (LASCR)
(d) All of the above
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