Power Electronics Lab

1) In a BJT

• A. The base region is sandwiched between emitter and collector

• B. The collector is sandwiched between base and emitter

• C. The emitter region is sandwiched between base and collector

• D. None of the above

2) A transistor has …………………

• A. one pn junction

• B. two pn junctions

• C. three pn junctions

• D. four pn junctions

3) In a npn transistor, ……………. are the minority carriers

• A. free electrons

• B. holes

• C. donor ions

• D.acceptor ions

4) A Triac has three terminals viz ………………

• A. Drain, source, gate

• B. Two main terminal and a gate terminal

• C. Cathode, anode, gate

• D. None of the above

5) A DIAC has three terminals viz ………………

• A. Drain, source, gate

• B. Two main terminal

• C. Cathode, anode, gate

• D. None of the above

6) The device that does not have the gate terminal is ……………….

• A. Triac

• B. FET

• C. SCR

• D. Diac

7) A UJT is sometimes called …………. diode

• A. Low resistance

• B. High resistance

• C. Single-base

• D, Double-base

8) The UJT may be used as ……………….

• A. Am amplifier

• B. A sawtooth generator

• C. A rectifier

• D. None of the above

9) An SCR has three terminals viz ……………

• A. Cathode, anode, gate

• B. Anode, cathode, grid

• C. Anode, cathode, drain

• D.None of the above

10) PUT stands for

• A. Programmable Unijunction Transistor

• B. Programmable Universal Transistor

• C. Pulse Unijunction Transistor

• D. Pulse Universal Transistor