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Thyristors – 1 – 1

1. A thyristor can be used as :

(a) A resistor
(b) An amplifier
(c) A switch
(d) A power source     

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

4. A silicon controlled rectifier has :

(a) Two external leads
(b) Three external leads
(c) Four external leads
(d) Three doped regions

ANSWER

EXPLANATION

5. A SCR is usually turned on by :

(a) Breakover
(b) A gate trigger
(c) Breakdown
(d) Holding current

ANSWER

EXPLANATION

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