Does DC have a frequency? Does direct current have a frequency? Thank you for your questions.

DC has a frequency, as long as there is a current, there will be a frequency, of course the magnitude of the frequency can be changed.

Direct current. It is a certain direction of current, alternating current.

It is alternating in the direction of the current. Therefore, the direct current can just not change the direction, and the current magnitude can change, and the pulse current is an example. The so-called direct current frequency refers to the frequency of change in the magnitude of the current periodically.

The current that remains the same in direction and magnitude is called direct current, which is commonly known as direct current.

That is, the amount of electricity passing through the cross-section of the conductor per unit time is equal, it is called steady current or constant current, referred to as direct current (direct current), denoted as DC or DC, and the DC current should be represented by the capital letter i.

The relationship between the DC current i and the time t is in the i-t coordinate system.

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Parallel straight lines.

Whether it is AC or DC, as long as there is current, there will be a frequency, and of course the magnitude of the frequency can be changed.

Direct current. Of course, there is a frequency, because the magnitude and direction of the direct current do not change, and the frequency is the reciprocal of the period, the period can approach 0, the frequency is naturally infinite, and it can be regarded as no frequency change in physics.

In fact, the so-called alternating current.

It is a current with periodic changes, such as household 220V, which changes periodically 50 times in a nail, and the frequency is 50Hz, that is to say, f=1 t, and t depends on the size and direction of the current, and the frequency is equal to the number of periodic changes in one second.

Extended information: "Direct current" (DC), also known as "constant current", constant current is a kind of direct current, which is a direct current that does not change in size and direction, and it was created by Edison.

discovered. Franklin, America, 1747.

The law of conservation of electric charge was proposed based on experiments, and the terms of positive and negative electricity were defined.

A constant current means that neither the size (voltage) nor the direction (positive or negative) change over time (within a relative range), as in the case of a dry cell battery.

Pulsating direct current means that the direction (positive and negative) does not change, but the magnitude changes over time, for example, we pass 50 Hz of alternating current through a diode.

After rectification, the typical pulsating direct current, the half-wave rectification is 50Hz pulsating direct current, if it is a full-wave or bridge rectification to get 100Hz pulsating direct current, they only become smooth direct current after filtering (with inductance or capacitance), of course, there is still a pulsating component (called ripple coefficient), depending on the filtering effect of the filter circuit.

Overseas Information Network.

Headline Encyclopedia.

The frequency of domestic alternating current is generally 50 hertz, that is, it changes 50 times per second. In some countries, the frequency of alternating current is 60 Hz, which is 60 changes per second. Of course, there are other frequencies as well.

For example, there are square waves, triangles, etc. in the electronic circuit, but the alternating current of these waveforms is not generated by the conductor cutting the magnetic field line, but is generated when the capacitor is charged and discharged, and the transistor is switched.

The direction of direct current does not change with time. It is usually divided into pulsating direct current and steady current sails. For example, the voltage of about 300 volts in the power supply circuit in the color TV is the pulsating DC component, which can be removed by capacitors.

Steady current is ideal, and the magnitude and direction are constant.

Be! Direct current, a current that does not change in magnitude and direction. Because there is no periodic change, there is no frequency problem.

Except for pulsating DC, square wave DC, etc., which have frequencies, constant DC has no frequency.

There is also a saying that only AC has a frequency, and DC has no frequency. Partner.