Thyristors » Exercise – 1
1. A thyristor can be used as :
(a) A resistor
(b) An amplifier
(c) A switch
(d) A power source
2. The minimum input current that can turn on a thyristor is called the :
(a) Holding current
(b) Trigger current
(c) Break-over current
(d) Low-current drop out
3.The minimum anode current that keeps a thyristor turned on is called the :
(a) Holding current
(b) Trigger current
(c) Breakover current
(d) Low-current drop out
4. A silicon controlled rectifier has :
(a) Two external leads
(b) Three external leads
(c) Four external leads
(d) Three doped regions
5. A SCR is usually turned on by :
(a) Breakover
(b) A gate trigger
(c) Breakdown
(d) Holding current
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