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Zero = Nothing = Nil = 0 Hertz or Cycles per Second Direct Current is just as its name says: it does not alternate so it does not have any "frequency".
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoNo of transmitted bits or digits per second
Wiki User
∙ 13y agoFrequency refers to AC, Alternating Current like 60 HZ. DC does not alternate so
frequency does not apply.
Wiki User
∙ 10y agoSince direct current doesn't reverse direction over time, it doesn't have a frequency.
Wiki User
∙ 11y ago0Hz exactly
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When low frequency signals added to high frequency signal then the envelope signal will follow which signal?
the low frequency signal which is nothing but the message signalNeither. The envelope will be that of the difference beat frequency. To get the envelope to follow the low frequency input signal you need to mix (multiply) the two signals, not add them.
Is The carrier frequency is usually lower than the modulating frequency?
when the frequency is low , energy will be obviously low. To increase the energy of the signal we need to increase the frequency. This is achieved by multiplying the message signal with the carrier signal (with high frequency).
What happens if we sample the signal at sampling frequency nearer to signal frequency?
If you sample at more than the Nyquist frequency (one half the signal frequency) you introduce an aliasing distortion, seen as sub harmonics.
What is signal modulation?
modulating signal is the message to be carried by the carrier signal.
Is it true or false that in frequency modulations the frequency of the carrier signal is modified by the application of the data signal?
True.
How does frequency affect amplitude?
we use dc supply for amplifcation and dc have no frequincy. we amplify just signal curent or signal voltage.
Is DC signal is periodic?
Yes DC is periodic with zero frequency........and undefined fundamental time period To........
Why do highpass filters block the DC signal?
Because DC is the lowest frequency (0 Hz) so that it does not pass the filter.
Why the frequency of a digital signal is infinite?
actually the frequency of a digital signal in infinite because assuming the signal is a square wave for each point in time eg 1 sec the amplitude can remain at max or "dc" for any number of bits assuming 1 bit = dc for 1 sec/clock cycle
How to removed a dc offset from the output of a frequency generator connected to a test circuit?
Run the test signal through a small isolation transformer.
What is frequency of dc?
You can say DC voltage has a frequency of zero Hz.Because it is unidirectional in nature (may be positive or negative)
Comparison of amplitude modulation and frequency modulation?
Amplitude of the (high frequency) Carrier signal is varied with respect to low frequency of message signal is called amplitude modulation. Frequency of the carrier signal is varied with respect to low frequency of message signal is called frequency modulation.
When low frequency signals added to high frequency signal then the envelope signal will follow which signal?
the low frequency signal which is nothing but the message signalNeither. The envelope will be that of the difference beat frequency. To get the envelope to follow the low frequency input signal you need to mix (multiply) the two signals, not add them.
What is the frequency of 27 DC volts?
Basically, "frequency" applies to AC, not to DC. If you want to assign it a frequency, the frequency is zero. The amount of volts is not relevant.
Why you convert FM signal to IF frequency?
Mix it with a local oscillator whose frequency is (the IF frequency) away from the frequency of the FM signal you're interested in.
Why the linear combination of a low frequency intelligence signal and a high frequency carrier signal is not effective as a radio transmission?
to shift the frequency of information signal ,at the frequency domain to a higher frequency ...so the information can be transmitted to the receiver.
What is meant by zero phase frequency?
The zero phase frequency is the frequency at which the phase of the input signal and the output signal match.
