FREE ENGINEERING AND STUDY GAMES ABOUT THEORY

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FREE ENGINEERING AND STUDY GAMES ABOUT THEORY

FINAL EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -34 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: how many valence electrons do the atoms in intrinsic conductors have?

Answer:

4

Question 2: how is ammeter connects in circuit?

Answer:

series Question 3: when a transistor is driven into saturation, how much voltage is dropped across the collector-emitter section?

Answer:

.3v

Question 4: LED

Answer:

light emitting diode

Question 5: what are the majority current carriers in a p-type semiconductor?

Answer:

holes

Question 6: emitter (e) connection

Answer:

output of the power current

Question 7: how is a transistor driven into saturation?

Answer:

providing more current through the base-emitter junction than is required to operate normally

Question 8: what job does a zener diode typically do in a circuit?

Answer:

regulates voltage

Question 9: does do the letters SCR stand for?

Answer:

silicon controlled rectifier Question 10: what does a heat sink do for an electronic component and how does a heat sink work?

Answer:

helps reject more heat to the air around it. works by increasing the surface area of the component

Question 11: what are the majority current carriers in a n-type semiconductor?

Answer:

electrons

Question 12: SSR Pros

Answer:

longer life, does not generate as much electromagnetic interference, more resistant to shock

Question 13: base (b) connection

Answer:

control current Question 14: if a diode is made from silicon, about how many volts does it take to turn it on so that it will conduct current in the forward direction?

Answer:

.7v

Question 15: SCR

on state- off state-

Answer:

on-close contact off-open contact

Question 16: what is a disadvantage of driving a transistor into saturation?

Answer:

slower operating frequency

Question 17: why is silicon used more often than germanium?

Answer:

withstand more heat

Question 18: three terminals of SCR

Answer:

gate, anode, and cathode

Question 19: why is it desirable to drive a transistor into saturation?

Answer:

more power is available to the load

Question 20: SSR Cons

Answer:

contains semiconductors that can get damaged from voltage spikes, ON- state resistance and OFF-state leakage current, produce more heat

Question 21: collector (c) connection

Answer:

source of the power current Question 22: what happens in a common junction diode if i apply a reverse voltage greater than its rated peak inverse voltage?

Answer:

breakdown occurs. current flows in the reverse direction and the common junction diode is destroyed Question 23: how many layers of semiconductor material are required to make a transistor?

Answer:

3 Question 24: what type of semiconductor material can withstand the greatest amount of heat?

Answer:

silicon

Question 25: how is current flow turned off after its been turned on?

Answer:

the amount of current through anode and cathode must be reduced to a level below the holding current Question 26: what characteristic permits the bilateral switch to conduct current at a lower voltage than it takes to turn it on?

Answer:

it has a dynamic impedance curve with a negative resistance once the breakover voltage is achieved Question 27: what is the difference between an intrinsic semiconductor material and an extrinsic semiconductor material?

Answer:

number of valence electrons Question 28: what is the most common system used in the identification of transistors?

Answer:

2N Registry