0
What else can I help you with?
What is the function of modulator in a communication system?
Modulation is defined as a process by which any characteristics of a wave is varied as a function of the instantaneous value of another wave. The first wave which is a high frequency sine wave is known as carrier wave. Second wave is known as modulating wave and the resultant wave is known as the modulated wave.
What is the frequency in broadcasting?
Depending primarily on its frequency,radio wave may travel from the tranmitting to the receiving aerial in a number of ways.The most important of these are : 1. Ground waves (or Surface waves):they are useful for low frequencies of below 1000 KHz . 2. Sky waves: the transmission of radio waves in the frequency range of 3 to 30 MHz. 3.Direct waves( or line-of sight waves):At frequency above 30 MHz ,radio transmission cannot be carried out by ground wave or sky wave.
Which relation is there between wavelength and height?
There is no relation between wave length and wave height. You can change the wave height independently from the wave length. Wave height tells you which amplitude the wave has. If you think of sound that means how loud it is. The wave length tells you the pitch or the frequency of this sound, that means high or low sound. Long wavelength means bass sound and short wavelength means treble sound.
What is the low frequency gain in operational amplifier?
low frequency gain will be 20log(Vo/Vin)
Is square wave inverter harmful to electronic devices?
Depends on the device. For instance almost all laptop power supplies use a international (aka universal) switch mode power supply. They don't care about modified sine wave output at all! Almost all low-cost inverters use a step-wave output that approximates a RMS sine wave (like wall voltage). This is a double square wave with a gap between the negative going and positive going squares. The inverter companies call this "modified sine" which is kind of a misnomer used as a marketing term. The more expensive inverters use a high-frequency Class-D amplifier to produce a more accurate approximation of a sine wave. It's usually not "pure", as it has some amount of harmonic distortion, but for marketing reasons they try to distinguish their product from the "modified-sine" by using the "pure sine" misnomer. The front end of all switch-mode power supplies rectify the incoming AC into DC as a first step in conversion. Step wave rectifies just as well as a normal sine wave! The ONLY reason to run "pure sine" inverters is if you are running sensitive audio gear with linear power supplies, as step-wave will induce a buzzing noise in the audio signals whereas the smoother approximation will not. Don't believe the hype that the "pure sine" inverter companies promote, it simply isn't true. The only things that are dangerous to run on step-wave are things with triac devices or capacitor-based power supplies. This includes things like Dewalt power tool chargers, light dimmers, etc. If it's extremely light (feels like there's nothing in it), and/or it has a 120V rating only, then it's probably not safe for step-wave use. Dewalt chargers have been known to fail and overheat on step-wave! If your power supply has a wide input voltage, such as almost all laptop supplies (100-240v), it is a universal switch mode supply and therefore safe. This includes most small electronics chargers, like for phones, iPods and cameras. If the voltage requirement reads only 120V and it's NOT a heavy "wall-wart" type supply, it's probably not safe. Check your nameplates! If your device has sound such as a TV or Stereo and it emits a buzzing sound out of it's speaker when you run it on step-wave, then that's not harmful, but is an annoying side-effect. You can buy the more expensive "pure-sine" model if this is undesirable.
How do you convert square wave to sine wave?
Filter the square wave with a low-pass filter sharp enough to remove all frequencies above the frequency of the square wave.
Can a low pass filter be used as an integrator?
When a low pass filter is used with a sine wave input, the output is also a sine wave. The output will be reduced in amplitude and phase shifted when the frequency is high, but it is still a sine wave. This is not the case for square or triangular wave inputs. For non-sinusoidal inputs the circuit is called an integrator.
What is the difference between a high frequency UPS and a Low frequency UPS?
The difference is in sine wave generation algorithm. In HI freq - it is 30kHz signal, modulated by 50Hz.
If a wave has a low frequency how do you describe the wave length?
The frequency of a wave is not directly related to the wave length. A low frequency wave or a high frequency wave may be either long-wave or short-wave.
If a wave have long wavelength it has a what frequency?
In that case, it will have a low frequency.
How would you describe the wavelength of a wave with low speed but high frequency?
The wavelength of a wave with low speed but high frequency would be short.
Does a high frequency wave transmit more energy than a low frequency wave?
No, the energy of a wave is determined by its amplitude, not its frequency. In terms of electromagnetic waves, both high and low frequency waves can carry the same amount of energy per photon. The perceived intensity of a wave is linked to its amplitude, not its frequency.
A wave with a low frequency does it have a short wavelength?
The product of (frequency) x (wavelength) is always the same number ... the speedof the wave. So the lower frequencies must have longer wavelengths.
A wave with low frequency would have relatively?
A wave with low frequency would have a longer wavelength and carry less energy. It would also have fewer oscillations per unit of time compared to a high-frequency wave.
What does the high frequency of a sound wave determine?
The frequency of a sound wave determines the pitch. So if there is high frequency it means that the sound will also be high pitched. If it is low frequency that means the sound will be low pitched.
How can you tell by looking at it if a wave has high or low frequency?
High-frequency waves have more waves packed into the same distance compared to low-frequency waves, with shorter distances between wave crests. So, a high-frequency wave appears to have more waves in a given space, while a low-frequency wave looks more stretched out with fewer waves in the same space.
Which takes more energy a high frequency wave or a low frequency wave?
A high frequency wave typically requires more energy than a low frequency wave because it carries more oscillations per unit of time. This means that high frequency waves have a higher energy content due to the faster rate of vibration.
