1.Which of the following components is not a pnpn device?

a.triac

b.field effect transistor (FET)

c.silicon controlled rectifier (SCR)

d.programmable unijunction transistor (PUT)

2.Thyristors belong to a class of devices of the type indicated.

a.p

b.pn

c.pnp

d.pnpn

3.The following device is normally used in conjunction with the SCR in control circuits.

a.Field Effect Transistor (FET)

b.Unijunction Transistor (UJT)

c.Tunnel Diode (Esaki Diode)

d.MOS Transistor

4.Fig.1 shows a

a.Silicon Controlled Rectifier

b.Programmable Unijunction Transistor

c.Triac

d.Silicon Controlled Switch


[ANSWERS]

Updated on 17 Dec 2000
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