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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.
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Characteristic series of frequencies of electromagnetic radiation substances emit?
Spectra
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.
The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to?
It is probably due to conductivity. Not 100% Sure --Chetan
Why oxygen and nitrogen are not greenhouse gas?
Different molecules have different characteristic vibrational frequencies for their interatomic bonds. They absorb energy that matches that frequency. The vibrational frequencies for O2 and N2 bonds don't match the main wavelengths of the energy coming from the sun or radiating back out from the earth. Water (~98 of the greenhouse effect is from water vapor) and other greenhouse gases DO have vibrational frequencies that match that energy and thus readily absorb it.
The frequencies of sound that carry the farther in air are?
Large (large amplitude)
What is thermal loss in dielectric heating?
Thermal loss in dielectric heating
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 respectively high or low?
For an insulating material dielectric strength and dielectric loss should be respectively high or low
For an insulating material dielectric strength and dielectric loss should be what?
high and high
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
What are elecromagnetic waves with the highest frequencies called?
gamma rays. they have the shortesst wawvelengths and the highest 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.
Which of the three frequencies has the highest pitch?
faster
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.
What is signal distortion in transmission lines?
there are some distortion in transmission line : copper loss,dielectric loss,skin effect
Which is the best electrical insulator?
According to a few charts I was able to find, the most realistic material with the highest dielectric strength happens to be Mica, with dielectric strength of 118.
