4. (TCO 2) In normal operation of an npn transistor, the base must be (Points :
ID: 1985698 • Letter: 4
Question
4. (TCO 2) In normal operation of an npn transistor, the base must be (Points : 7) positive with respect to the collector.negative with respect to the collector.
positive with respect to the emitter.
negative with respect to the emitter. Question 5.5. (TCO 2) Which best describes a field-effect transistor? (Points : 7) A current-controlled device in which current at the base controls the collector voltage
A voltage-controlled device in which voltage at the base controls the collector current
A current-controlled device in which the current at the gate controls collector current
A voltage-controlled device that is attributed to having high input impedance 4. (TCO 2) In normal operation of an npn transistor, the base must be (Points : 7) positive with respect to the collector.
negative with respect to the collector.
positive with respect to the emitter.
negative with respect to the emitter.
Explanation / Answer
4.For a npn transistor to works in active region the base junction must be forward biased.i.e. Base must be positive with respective to the emitter.
5.FET is a voltage controlled device and due reverse bias it has high input impedance. The drain current can be controlled by the Gate to source voltage Vgs.