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# What is the frequency of AC and DC?

## What is the frequency of AC and DC?

A video comparing Alternating Current and Direct Current

Alternating Current Direct Current
The frequency of AC is dependent upon the country. But, generally, the frequency is 50 Hz or 60 Hz. DC has no frequency of zero frequency.

## What is the value of frequency of DC in India?

The frequency of AC and DC supply in India is 50Hz and 0Hz respectively.

Is there a frequency in DC?

In DC, the current is constant at any given time. The time period of a DC supply is constant. Hence, the frequency of the DC is always zero.

### What is the frequency in AC?

Alternating current (ac) frequency is the number of cycles per second in an ac sine wave. Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second.

### What is the value of frequency?

Definition. Frequency is the number of times a value, value range or event occurs in gathered data. For example, if you conduct a survey of your employees to see how happy they are at their jobs, and five employees answer “very happy,” the answer “very happy” has a frequency value of five.

What is the frequency of a DC power supply?

The two most common frequencies are 50 Hz and 60 Hz. The equipment designed to use AC tends to require large amounts of voltage, so the voltage is not stepped down as frequently as equipment using DC. DC allows for a constant flow of current to a device.

## Which of the following is equal to 1 Hz?

Hertz is the unit of frequency. Frequency is the number of cycles per second in an ac sine wave. Frequency is the rate at which the current changes its direction per second. One hertz is equal to one cycle per second and therefore 1 hertz is equal to 60 vibrations per minute.

## How to calculate the DC value of a signal?

Any signal x (t) can be decomposed as a DC component plus an AC component as x (t) = X d c + x a c (t) where the DC component X d c does not depend on time and the AC component x a c (t) has zero DC value. For example for the signal x (t) = 2 cos 2

Which is true about the frequency of DC?

Frequency = ( number of changes /sec), so it is the number of times the voltage changes. A pure dc is constant.

### Is the frequency of a DC signal zero or infinite?

A DC signal, simply by the looks of it can be said to have either zero frequency or infinite frequency. This answer is based upon the definition of frequency which is given as the reciprocal of time period of a signal. However, in communications, frequency is a term which is defined with respect to sinusoids only.

### What is the frequency of an AC current?

In contrast, AC current has a frequency and it is 50/60 Hz. As the name insists, the alternating current alternates between the +ve and -ve axes further producing definite cycles per second. But, you can have frequency in DC supply also. Its the fluctuating DC or the pulsating DC which is not the pure form of DC.