Answer:
Explanation:
Answer:
A. constructive interference.
Explanation:
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ultraviolet waves
light waves
sound waves
Ultrasounds are used in the medical profession for the purpose of diagnosis. Ultrasounds uses high frequency sound waves. Thus, the correct option is D.
Ultrasound are the sound waves with frequencies which are higher than the upper audible limit of normal human hearing. Ultrasound is not different from normal audible sound frequencies in its physical properties, except that humans cannot hear these sound.
Ultrasound is used in diagnostics where it is also called as sonography or diagnostic medical sonography. It is an imaging method which uses sound waves to produce images of structures within the body of a person. The images produced can provide valuable information for the purpose of diagnosing and directing treatment for a variety of diseases and conditions.
Therefore, the correct option is D.
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Answer:
D. sound waves
Explanation:
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a. direction a
b. direction b
c. direction c
d. direction d
A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. direction will the acceleration on the ball be when the ball passes point A is direction a. Hence option A is correct.
Angular velocity is "rate of change of angular displacement with respect to time". i.e. ω= dθ/dt. it is also defined as angular displacement over time. i.e. ω = angular displacement/Time.
Angular velocity shows how much angle can be covered in unit time. It's SI unit rad/s. direction of the Agular velocity is given by right hand thumb rule.
Angular acceleration is rate of change of Angular velocity with respect to time.
i.e. α = dω/dt if an object changes its angular velocity in short time, we can say that it has greater angular acceleration. It is expressed in rad/s².
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The largest diversity of plants and animals on the planet is found in one terrestrial biome. It is a true statement.
Large-scale habitats known as biomes can be identified by their distinctive temperature ranges and precipitation rates. The kinds of vegetation and animal life that can exist in those locations are influenced by these two factors. The same biome can exist in physically separate regions with similar climates because each biome is characterized by climate.
There are eight main terrestrial biomes: temperate grasslands, temperate forests, boreal forests, Arctic tundra, and tropical rainforests, savannas, subtropical deserts, and chaparral.
All this terrestrial biomes has large diversity of plants and animals on the planet .
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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.
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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