There are two questions, first about an ideal diode and then about a modeled diode. For the modeled diode, the voltage across its terminals is 0.7V when it is "on". Which of the following statements are true about the ideal diode above? a. It is possible for i to be positive. b. If i= 0, then v ≤0. c. If i > 0, then the diode can be replaced by an independent current source. d. If v = 0, then the diode can be replaced by an independent current source. e. If i = 0, then the diode can be replaced by an independent current source. f. It is impossible for v to be negative. g. None of these statements is true. Enter a single string of letters, in alphabetical order ("abcdef"). Answer: Which of the following statements are true about the modeled diode above? a. If i = 0, then the diode can be replaced by a open circuit. b. It is possible for i to be equal to 0. c. If y = 0, then i = 0. d. If v<0, then the diode can be replaced by a open circuit. e. If v = 0, then the diode can be replaced by a open circuit. f. If v<0, then i = 0. g. None of these statements is true. Enter a single string of letters, in alphabetical order ("abcdef"). Answer:
Analysis of Diode
It is a semiconductor device in electronics applications where only a one-way current is required. It is like a one-way switch that allows current to flow in one direction only. A diode has two terminals, a cathode, and an anode. The cathode is the negative terminal that carries electrons, while the anode is the positive terminal that carries holes. Although no element has holes, it just means that there is a free space for electrons. Diodes are used to convert AC to DC. As we know, AC shifts between positive and negative cycles and DC stays positive constantly. As the diodes allow current only in one direction, they filter out the AC signal’s negative cycle and only keep the positive one.
Working and Construction
In civil engineering, construction means the application of principles of science and mathematics for building bridges, dams, buildings, roads, highways, tunnels, airports, structures, etc. Different branches of science, like physics and chemistry, are extensively applied to design and analysis in construction. Material properties, the science of atmospheric conditions (like solutions, mixtures, etc.), the impact of environmental factors like, corrosion and acidity are some of the primary knowledge of chemistry which are used by civil engineers to carry out construction. Estimation of forces, application of laws of mechanics, fluids mechanics, soil mechanics, etc. are some of the fundamental concepts of physics, which are well applied in construction works. Building construction and structural engineering are two of the most primary areas in civil engineering that parallelly applies principles of both chemistry and physics to carry on construction works.
Property of Diode
An electronic component that facilitates the directional flow of current is known as a diode. According to the direction of the flow of current, the resistance of a diode changes from zero to Infinity.
![Answer:
+
There are two questions, first about an ideal diode and then about a modeled diode. For the modeled diode, the voltage across its terminals is 0.7V when it is "on".
Which of the following statements are true about the ideal diode above?
a. It is possible for i to be positive.
b. If i= 0, then v ≤ 0.
c. If i > 0, then the diode can be replaced by an independent current source.
d. If v = 0, then the diode can be replaced by an independent current source.
e. If i = 0, then the diode can be replaced by an independent current source.
f. It is impossible for v to be negative.
g. None of these statements is true.
Enter a single string of letters, in alphabetical order ("abcdef").
V
Answer:
Which of the following statements are true about the modeled diode above?
a. If i= 0, then the diode can be replaced by a open circuit.
b. It is possible for i to be equal to 0.
c. If v = 0, then i = 0.
d. If v<0, then the diode can be replaced by a open circuit.
e. If v = 0, then the diode can be replaced by a open circuit.
f. If v<0, then i = 0.
g. None of these statements is true.
Enter a single string of letters, in alphabetical order ("abcdef").](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd66a1b7f-4060-43a7-ba79-89d5c229b00d%2Fc5ce5b56-9bd6-476b-bc00-000a337c067b%2Fqe85pnm_processed.png&w=3840&q=75)
![A diode is a two-terminal, electronic device made using semiconductors that is designed to prevent current from flowing in a particular direction. The symbol is a triangle pointing in the direction that
(positive) current is allowed to flow and a wall preventing (positive) current from flowing in the opposite direction:
+
17:
A diode has two modes, "on" and "off". When "on", current flows, and when "off", no current flows. We generally view diodes as either "ideal" or "modeled", as described below.
"Ideal" view of a diode
The "ideal" diode is either a short circuit or an open circuit. Specifically, when the voltage across its terminals is negative, no current flows, and when current flows, there is zero voltage across its terminals,
as pictured below:
Diode
Ideal Diode "Off"
i=0
+
&:T
V
+
U≤0
Diode
Ideal Diode "On"
Therefore, with current i and voltage v defined as shown on the left above, for an "ideal" diode:
• Current i cannot be negative.
• Voltage v cannot be positive.
. The diode cannot absorb or deliver power.
NOTE: The first two statements will change if the current arrow and/or voltage polarity change.
"Modeled" view of a diode
Modeled Diode "Off"
i> 0
For a more realistic view of a diode, we replace the short when "on" with a small independent voltage source. When (positive) current is flowing in the direction of the triangle, the diode behaves like a 0.7V
source. (Other values of the voltage are possible, but 0.7V is a particularly common value.) When the voltage is less than 0.7V, the diode is "off" and no current flows, as pictured below:
+
+
V = 0
i> 0
i=0 |
+
1&3TH T
V
V < 0.7V
Modeled Diode "On"
V = 0.7V
Therefore, again with current i and voltage v defined as shown on the left above, for a "modeled" diode:
• Current i cannot be negative.
• Voltage v cannot be greater than 0.7V. (It can be negative.)
• When "off", the modeled diode absorbs no power. When "on", the modeled diode necessarily absorbs positive power.
NOTE: The first two statements will change if the current arrow and/or voltage polarity change.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd66a1b7f-4060-43a7-ba79-89d5c229b00d%2Fc5ce5b56-9bd6-476b-bc00-000a337c067b%2Funelqpb_processed.png&w=3840&q=75)
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