Electrical & Computer Engineering Exam 2: Questions and Answers, Exams of Advanced Education

A comprehensive set of questions and answers covering key concepts in electrical and computer engineering. It delves into topics such as diodes, semiconductors, transistors, binary systems, logic gates, and digital circuits. Ideal for students preparing for an exam in this subject, offering a valuable resource for self-assessment and understanding fundamental principles.

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2024/2025

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ELECTRICAL & COMPUTER ENGINEERING EXAM 2 QUESTION AND ANSWER
Under normal conditions a diode conducts current when it is
forward-biased.
The movement of free electrons in a conductor is called
current.
Which statement best describes a semiconductor?
- A material with very few free electrons.
- A material with many free electrons.
- A material with many free holes.
- A material doped to have some free electrons.
A material doped to have some free electrons.
Silicon uses four electrons to form bonds with adjacent silicon atoms. If silicon atoms are
replaced with atoms with five electrons for bonding, this produces:
a n-type material.
An off-biased diode has the _____ connected to the positive side of the battery, and the _____
connected to the negative side of the battery.
cathode, anode
Silicon uses four electrons to form bonds with adjacent silicon atoms. If silicon atoms are
replaced with atoms with three electrons for bonding, this produces:
a p-type material.
In a n-type material, majority carriers would be:
electrons.
When PN junction diode is connected in forward-biased, the Depletion region:
becomes the narrower.
When PN junction diode is connected in reverse-biased, the Depletion region:
becomes wider.
A PN-junction diode acts as a:
switch.
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ELECTRICAL & COMPUTER ENGINEERING EXAM 2 QUESTION AND ANSWER

Under normal conditions a diode conducts current when it is forward-biased. The movement of free electrons in a conductor is called current. Which statement best describes a semiconductor?

  • A material with very few free electrons.
  • A material with many free electrons.
  • A material with many free holes.
  • A material doped to have some free electrons. A material doped to have some free electrons. Silicon uses four electrons to form bonds with adjacent silicon atoms. If silicon atoms are replaced with atoms with five electrons for bonding, this produces: a n-type material. An off-biased diode has the _____ connected to the positive side of the battery, and the _____ connected to the negative side of the battery. cathode, anode Silicon uses four electrons to form bonds with adjacent silicon atoms. If silicon atoms are replaced with atoms with three electrons for bonding, this produces: a p-type material. In a n-type material, majority carriers would be: electrons. When PN junction diode is connected in forward-biased, the Depletion region: becomes the narrower. When PN junction diode is connected in reverse-biased, the Depletion region: becomes wider. A PN-junction diode acts as a: switch.

To make NPN transistor in "ON" state, Base and Emitter junction must be _____ while Base and Collector junction must be _____. forward-biased, reverse biased In electronic circuit, a transistor acts as A & B Silicon is a common element found in _____ and is _____ percent of the Earth's crust. sand, 28% Emitter and Base junction (VBE) requires _____ v to activate this junction into ON state.

Triode is an enhancement device of diode structure in which _____ is added to _____. control grid, control electrons movement Find the sum of the binary numbers 1011 + 0110 = 10001 What are the symbols used to represent digits in the binary number system? 0, Give the decimal value of binary 10010. 18 Give the decimal value of binary 10000110. 134 Find the 2's complement of the binary number 010011. 101101 Binary systems in electronic technology have _____. two states Digital systems require that voltage levels change between high and low. True In electronic technology, a digital voltage has a discrete set of values.

If the output of a three-input AND gate must a logic LOW, what must the condition of the inputs be? ? Logically, the output of a NOR gate would have the same Boolean expression as a(n): ? Which of the following gates has the exact inverse output of the OR gate for all possible input combinations? NOR Logically, the output of a NAND gate would have the same Boolean expression as a(n): AND gate immediately followed by an inverter. The truth table below pertains to a _____. OR gate Which of the following is not a basic Boolean operation? FOR This truth table applies to a(n) AND gate For the full adder, X, Y and Cin are the inputs to the adder and S and Cout are the outputs of the adder. If X = 0, Y = 1, and Cin = 0, Then S = ___ and Cout = ___ S = 1, Cout = 0.

The full adder consists of the following logic gates XOR, AND, and OR. What would be a "Set" state logic inputs for SR latch? ? On the _____ edge of clock, D-FF change its state accordingly. positive The inputs of first operation at D-FF reported Clk = 1 and D = 0. Second operation reported Clk = 0 and D = 0. What would be the output state (Q) at the second operation? ? What is the sum (in decimal) of below operation: 101011 + 101101 = 88 What is the result of the following operation: 101110 - 1101 = 100001