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What happens if the AC frequency generated by local power companies drops below 50-60 Hz?
If the frequency of the AC mains decreases, then all of the electric clocks in
your house will run slow and lose time. For example, if the 60 Hz utility drops
to 59.9 Hz and stays there, then your clocks will be 2minutes and 24seconds
behind the correct time after one day. This is a fairly serious amount, and a
tight restriction on the required accuracy. Several years ago, when I was
working briefly in the dispatch and control center of the electric utility in a
major US city, they showed me the frequency monitor, and explained that
if the frequency goes low, for example, for some period of time, then they
were responsible to then run it high, for just the right length of time so that
all the clocks in the city would return to the correct time. I'm quite sure that
all of that is totally obsolete now, since the major utilities now buy and sell
and share each others' power, and in order to do that, they all have to be
exactly at the same frequency and phase.
If the AC mains were to go down significantly in frequency, then all of
the motors in your house ... like the ones in your furnace, air conditioner,
refrigerator, freezer, ceiling fans, etc. ... would operate weakly, overheat,
and possibly burn out if things stayed like that for too long.
What else can I help you with?
What happens when a signal is sampled below its Nyquist frequency?
Introduces the aliasing effect which eventually would account for information loss...(aliased signals)
What is alpha cut of frequency?
it is the frequency at which the current amplification drops 3dB below its low frequency value.
What happens to the speed of an induction motor if the supply frequency is increased?
The supply frequency determines the synchronous speed of the machine -i.e. the speed of the naturally-rotating field within the airgap. As motors typically run around 5% below this speed, the rotor's speed would increase.
What is RF coil?
RF (Radio Frequency Coil) is a coil, which is designed to resonate at a frequency some where in the radio spectrum frequency. See L C Circuit Link Below.
What is meant by beta cutoff frequency?
The beta cut off frequency is the frequency at which the current amplification of an amplifier transistor drops to three decibels below its value at 1 kilohertz. This is used in electronic engineering.
What happens to electrons if photon frequency is below threshold?
If the photon frequency is below the threshold frequency, the electrons do not have enough energy to be emitted from the material's surface, and no photoelectric effect occurs. The electrons will not be ejected and will remain bound to the material.
What is the range of frequency associated with .A) INFRA-SOUND?
The range of frequency associated with infrasound is below the lower limit of human hearing, typically below 20 Hz. These low-frequency sound waves can be generated by natural events like earthquakes or man-made sources like large machinery and can be felt rather than heard.
What happens when you reduce the freqency of a sound wave?
Below a certain frequency you won't hear it- depends on individual but about 20Hz
What happens when a signal is sampled below its Nyquist frequency?
Introduces the aliasing effect which eventually would account for information loss...(aliased signals)
What happens to a nuclear reactor when operated below grid frequency 50hz?
The nuclear reactor doesn't care. Only the turbines that spin the generators do.
What is alpha cut of frequency?
it is the frequency at which the current amplification drops 3dB below its low frequency value.
What does commulative frequency means?
Cumulative frequency refers to the running total of frequencies in a frequency distribution. It shows the number of observations that fall below a certain value in a data set. Each cumulative frequency is the sum of the corresponding frequency and all frequencies below it.
What do you mean by infrasonic waves?
Infrasonic waves are low-frequency sound waves that have a frequency below the human hearing range, typically below 20 Hz. These waves can be generated by various natural phenomena like earthquakes and weather patterns, as well as by man-made sources such as machinery and explosions. Despite being inaudible to humans, infrasonic waves can still have effects on our surroundings and physical environment.
What does it mean by 'above and below resonance?
'Above resonance' means a frequency higher than the resonant frequency of a system, while 'below resonance' means a frequency lower than the resonant frequency. At resonance, a system vibrates with maximum amplitude, making these concepts important in understanding the behavior of vibrating systems like simple harmonic oscillators.
What happens to the speed of an induction motor if the supply frequency is increased?
The supply frequency determines the synchronous speed of the machine -i.e. the speed of the naturally-rotating field within the airgap. As motors typically run around 5% below this speed, the rotor's speed would increase.
If you use a UK 240v to 110v yellow transformer and plug in to us 230v 60hz what happens?
It depends on the device itself. If it is an ordinary light bulb or the filament type, it may glow very lightly and it will convert electricity to heat rather than light. If your device is an electrical motor, it will draw more current than normal and will probably burn out.
What are infrasound waves?
Just like "infrared" is light that we can't see because its frequency is lower than the frequency of red light, "infrasound" is vibration or waves in air that we don't hear, because its frequency is lower that the lower limit of human sound perception.
