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Will amplitude modulated waves go more distance or frequency modulated waves?
The method of modulation has very little to do with the distance traveled, this is more dependent upon the frequency of the carrier. As the frequency gets higher the wave takes on more and more the characteristics of light. For example microwaves need to have the receiving dishes (antennae) in line of site with the transmitter.In practical circumstances it appears the AM travels further but that is only because AM broadcasts at lower frequencies (typically 526KHz to 1625KHz) (MF) and FM at higher frequencies (typically 88MHz to 108MHz)(VHF)
What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
Advantage and disadvantage about AC electric power with frequancy 50 HZ and 60HZ?
110 vs 230 Vac - The lower voltage is safer, but requires more current and larger wires. (BTW, the transmission loss is not worse because of 110 Vac because everything is distributed at much higher voltages, it only becomes 110 at the transformer near your home). 60 vs. 50 Hz - The higher frequency allows for the use of less iron in transformers and motors, but at the cost of more losses in the distribution system.
When testing a power transformer with an ohmmeter which winding should have the largest ohmic value?
The higher-voltage winding has more turns (therefore its conductor will be longer) than the lower-voltage winding and, because it will carry less current, its conductors will have a lower cross-sectional area. Consequently, the higher-voltage winding will have a higher resistance than the lower-voltage winding.
Why dont broadcast stations transmit at audio frequencies?
1) If information was transmitted at audio frequencies, then you would actually hear the signal. This would be identical to a speaker playing a song on your stereo. 2) Audio frequencies, in the world of radio frequencies, are long wave-length, low energy signals that can't travel long distances. Again, that's why you can only hear someone's stereo from within eyesight of the system. Human ears can detect from about 3Hz up to around 20KHz (some better than others). 3) True radio frequencies start at in the 100Khz range. This is your most basic radio that uses amplitude modulation (aka AM radio). Many people today that listen to the radio listen to frequency modulated (FM) stations. The difference between AM and FM is beyond the scope of the answer to this question. Being a higher frequency, the signals have more energy and can travel farther distances than audible frequencies. 4) Audible frequencies (sounds the human ear can pick up) can only "transmit" amplitude (loudness or volume) and frequency (high or low pitch). However, higher frequencies, such as those used for radio, can carry much more information than the volume and pitch of a signal. This is a direct result of radio frequencies being harmonics (integer multiples) of audible signals. For instance, if a radio signal has a frequency 20 times higher than the audio signal it is transmitting, then that radio signal can not only carry the audio signal, it can also carry other information, such as information about the broadcast station. A radio signal can "encode" information within the signal allowing more information to be carried than just the audio signal itself.
IF the frequency is maximum then the signal will far awy or near?
higher frequencies attenuate more the further distance they travel.
Is it better to have high Wavelengths or low Wavelengths?
It depends on the context. In terms of light, shorter wavelengths (higher frequencies) have more energy, while longer wavelengths (lower frequencies) have lower energy. In terms of sound, shorter wavelengths (higher frequencies) are perceived as higher pitched, while longer wavelengths (lower frequencies) are perceived as lower pitched.
Why are some sounds higher pitch than others?
Sounds with higher pitch have higher frequencies, meaning the sound waves vibrate more rapidly. This results in the perception of a higher pitch. Sounds with lower frequencies have slower vibrations and are perceived as lower pitch.
What are the effects of changing the frequency of a wave?
Changing the frequency of a wave alters its pitch or color. Higher frequencies result in higher pitches or bluer light, while lower frequencies create lower pitches or redder light. Additionally, changes in frequency affect the energy carried by the wave, with higher frequencies having more energy than lower frequencies.
Is this true or false objects that vibrate more quickly have lower frequencies?
False. Objects that vibrate more quickly actually have higher frequencies. Frequency refers to the number of vibrations per unit of time, so a higher frequency means more vibrations occur in a given time period.
How does sound frequency work?
Sound frequency refers to the rate at which a sound wave vibrates, measured in Hertz (Hz). Higher frequencies have more vibrations per second, resulting in a higher pitch, while lower frequencies have fewer vibrations, leading to a lower pitch. The human ear can typically hear frequencies between 20 Hz and 20,000 Hz.
Why is speaker wire stranded not solid?
high frequencies utilize the skin effect, running on the exterior of the conductor, with low frequencies utilizing the core of the conductor. Stranded wire has more skin area and would enhance higher frequencies, while solid wire would enhance lower frequencies. stranded is more flexible
What are the advantages of larger radio frequencies over smaller ones?
easier to transmit, higher frequencies radiate better. there is more bandwidth available at higher frequencies. higher frequencies travel in straighter lines so are more directional, this may or may not be an advantage depending on what is needed
Is the lower the frequency the louder the pitch sound?
No, the lower the frequency, the lower the pitch of the sound. Pitch is determined by the frequency of a sound wave, with higher frequencies corresponding to higher pitches. The perception of loudness is more closely related to the amplitude or intensity of the sound wave.
What does a bigger frequency sound like?
Sounds with higher frequency have higher 'pitch'.The sound of a woman's voice has more high frequency content in it than the sound of a man's voice has.The sound of a flute or a piccolo is at a higher frequency than the sound of a tuba or a trombone is.As you go up the keyboard from left to right, the sounds of the notes go up in pitch, because their frequencies go up.
Do all animals hear the same frequencies of sound as human do?
Some animals can hear higher frequencies than humans can. This is why animals can hear things like dog whistles, and we can't hear them. In all, animals can hear differently than humans in the way that they can hear more. Some animals can hear lower frequencies than humans can. Elephants can hear much lower frequencies than humans.
Why does microwaves has more energy than aan x rays?
Microwaves have lower energy than X-rays because they have longer wavelengths and lower frequencies. X-rays have shorter wavelengths and higher frequencies, giving them more energy. This difference in energy levels is due to the electromagnetic spectrum, with X-rays falling within the higher energy range compared to microwaves.
