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As the frequency increases the loss through heat also increases. At relaxation frequency while the dipoles will be just able to align themselves maximum loss is seen. At frequncy above relaxation frequency the dipoles will no longer able to keep up change with applied field. They become frozen.
What else can I help you with?
The frequencies of sound that carry the farther in air are?
Lower frequencies of sound tend to carry farther in air compared to higher frequencies. This is because lower frequencies have longer wavelengths, which allows them to diffract around obstacles and travel greater distances with less attenuation.
The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to?
Alkali oxides can lead to the formation of conductive paths within the ceramic material, which can cause dielectric breakdown. This is because alkali elements are known to increase the mobility of charge carriers within the material, making it easier for electrical current to flow through the ceramic. This can weaken the insulating properties of the material and result in dielectric breakdown.
What atmospheric conditions contribute to the highest rate of transpiration?
High temperatures, low humidity, and good air circulation all contribute to the highest rate of transpiration in plants. These conditions increase the rate of evaporation from the stomata on the plant's leaves, leading to more water loss through transpiration.
Characteristic series of frequencies of electromagnetic radiation substances emit?
Each substance emits a unique characteristic series of frequencies of electromagnetic radiation when it is heated or excited. These frequencies correspond to specific energy transitions within the atoms or molecules of the substance. By studying these emission spectra, scientists can identify the composition of the substance and gain insights into its structure and properties.
Does rubber conduct electricity at very high frequencies?
Rubber doesn't conduct electricity well at any frequency. But to the extent that it does conduct, it's better at low frequencies than high, because of the skin effect.
For an insulating material dielectric strength and dielectric loss should be respectively?
For an insulating material dielectric strength and dielectric loss should be respectively
For an insulating material dielectric strength and dielectric loss should be what?
high and high
For an insulating material dielectric strength and dielectric loss should be respectively high or low?
For an insulating material, the dielectric strength should be high to withstand high voltages without breaking down. Conversely, the dielectric loss should be low to minimize energy loss due to internal friction within the material when subjected to an electric field.
Which is another name for dielectric strength test?
ASTM D149 - 09 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
Why dielectric loss increases with temperature?
Dielectric loss increases with temperature because at higher temperatures, molecules in the dielectric material vibrate more vigorously, leading to increased collisions and energy dissipation. This increased molecular motion results in higher internal friction within the material, causing a rise in dielectric loss.
What is thermal loss in dielectric heating?
Thermal loss in dielectric heating refers to the energy that is dissipated in the form of heat due to the electrical resistance of the dielectric material. This heat loss can reduce the overall efficiency of the heating process and may lead to overheating issues if not properly managed. Techniques such as choosing appropriate dielectric materials and optimizing the design of the heating system can help minimize thermal losses.
What are elecromagnetic waves with the highest frequencies called?
gamma rays. they have the shortesst wawvelengths and the highest frequencies.
How do you reduce dielectric loss?
To reduce dielectric loss, one can use materials with lower dielectric loss tangents, such as ceramics or high-purity polymers. Increasing the frequency of operation can also help, as dielectric losses typically increase with frequency. Additionally, optimizing the design to minimize electric field intensity and using proper insulation techniques can further mitigate losses. Lastly, maintaining a consistent operating temperature can help reduce thermal effects that contribute to dielectric loss.
What is a lossy dielectric?
A lossy dielectric is a material that not only stores electrical energy in the form of an electric field when subjected to an electric field, but also dissipates some of that energy as heat due to its resistive properties. This energy loss is typically characterized by the material's loss tangent, which indicates the ratio of the resistive (real) power loss to the reactive (imaginary) power stored. Lossy dielectrics are commonly used in applications such as capacitors and RF components, where energy dissipation is a critical factor in performance. Examples include certain plastics and ceramics that may exhibit significant dielectric losses at specific frequencies.
Which type of capacitor has the highest voltage rating?
Those with vacuum as the dielectric have.
If colors have different wavelengths do they have different frequencies and temperatures?
Yes, light is electromagnetic waves. The longest wavelengths have the lowest frequencies and the lowest temperatures. The shortest wavelengths have the highest frequencies and the highest temperatures.
What happens when dielectric breakdown occurs?
The dielectric,usually the insulator between the plates of a capacitor, can be overstressed by the application of too high voltages applied to the capacitor plates. The dielectric breaks down and a current flows between the plates until,either they are discharged, or an equilibrium is reached,below the working voltage of the capacitor. If the dielectric is damaged in this process he capacitor must be replaced. Some dielectric material self heal and can recover from an over voltage.
