12. Which of the following accurately describes semiconductor diodes? A. Point-contact diodes are more likely to be used as rectifiers than junction diodes.
B. Unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit.
C. Unlike point-contact diodes, junction diodes utilize a point of metal wire in contact with a single wafer of P-type or N-type material.
D. Junction diodes are preferred over point-contact diodes for most purposes.
Answers
Answer;
D. Junction diodes are preferred over point-contact diodes for most purposes.
Junction diodes are preferred over point-contact diodes for most purposes; accurately describes semiconductor diodes.
Explanation;
-Semiconductor diodes are specialized electronic components with two electrodes called the anode and the cathode, that are made with semiconductor materials such as silicon, germanium, or selenium.
-Point contact diode is formed by touching a metallic wire with an N-type semiconductor to form a small area of contact.
-A p-n junction diode is two-terminal or two-electrode semiconductor device, which allows the electric current in only one direction while blocks the electric current in opposite or reverse direction. Junction diodes are preferred over point-contact diodes for most purposes.
Unlike junctiondiodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit accurately describes semiconductor diodes. Correct option is B.
Semiconductor diodes are electronicdevices that allow current to flow in one direction only. They are made of semiconductor materials and have different types based on their construction. The options given describe the differences between point-contact diodes and junction diodes:
A. Point-contact diodes are more likely to be used as rectifiers than junction diodes.
This statement is not accurate. Rectifier diodes are commonly junction diodes, not point-contact diodes. Junction diodes are widely used as rectifiers in various electronic circuits.
B. Unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit.
This statement is accurate. Point-contact diodes have a sharp metal point in contact with a semiconductor material, and they are typically enclosed in a protective casing with terminals for easy integration into electronic circuits.
C. Unlike point-contact diodes, junction diodes utilize a point of metal wire in contact with a single wafer of P-type or N-type material.
This statement is not accurate. Junction diodes are formed by the junction of P-type and N-type semiconductor materials, and they do not use a metal wire for contact.
D. Junction diodes are preferred over point-contact diodes for most purposes.
This statement is not entirely accurate. The preference between junction diodes and point-contact diodes depends on the specific application. Junction diodes are more commonly used in modern electronic circuits due to their superior performance and ease of fabrication. Point-contact diodes are older technology and are not as widely used today. However, there might still be some specific applications where point-contact diodes could be preferred.
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The sum of all forces applied to the object = (30) x (15)
= 450 newtons, in the direction of the acceleration.
F=a*m
a=
m=30kg
F=
definition please:)
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Answers
Answer:
ω = √(2T / (mL))
Explanation:
(a) Draw a free body diagram of the mass. There are two tension forces, one pulling down and left, the other pulling down and right.
The x-components of the tension forces cancel each other out, so the net force is in the y direction:
∑F = -2T sin θ, where θ is the angle from the horizontal.
For small angles, sin θ ≈ tan θ.
∑F = -2T tan θ
∑F = -2T (Δy / L)
(b) For a spring, the restoring force is F = -kx, and the frequency is ω = √(k/m). (This is derived by solving a second order differential equation.)
In this case, k = 2T/L, so the frequency is:
ω = √((2T/L) / m)
ω = √(2T / (mL))
Answers
Fnet = 0.1 * 30
Fnet = 3N
Answers
-renewable
-emissionless
-reduces distance required for electricity to travel
- can be produced effectively on small scale
Disadvantage
-No continual supply-doesnt function on cloudy days or at nightime
-expensive
-inefficient, best solar panels today are only 40% efficient, most are worse
Answers
Answer:
Hydrogen and helium compounds.
Explanation:
We know that the solar System was formed around 4.6 billion years ago, due to the gravitational collapse of a giant interstellar molecular cloud.
This cloud is a type of interstellar cloud and its density and size permit the formation of molecules, most commonly molecular hydrogen.
Therefore the principal substances were found before planets began to form are hydrogen and helium compounds, besides Rocks, metals, most of them in gaseous form.
I hope it helps you!