What is the difference between VDC and VAC?

Direct current: Refers to an electric current that does not change in magnitude and direction with time. Many electrical appliances, such as radios, speakers, and many other appliances that do not contain inductive components, are driven by direct current.

It is divided into positive and negative poles, and the voltage cannot be changed by using a transformer, so it is used in low-voltage electrical appliances. Appliances with dry batteries fall into this category.

Alternating current: Alternating current refers to the current whose magnitude and direction change periodically with time, and the usual alternating current changes according to the law of sine or cosine, and the current first changes from zero to maximum, and then from maximum to zero. Then the reverse direction changes from zero to maximum, and then from maximum to zero, completing one cycle, and then the next cycle, and so on.

Alternating current has great advantages, in addition to being used for some special electrical appliances, such as motors, it has special significance for the transmission of electricity, especially long-distance transmission.

The final voltage is theoretically straight-line DC, and the transformer can be DC boosted. It is possible to turn into an unsteady current through the circuit. It's really not something that can be said clearly,

Direct current An electric current that does not change in magnitude or direction with time. Also known as constant current. The circuit through which it passes is called a DC circuit, which is a closed conductive circuit composed of a DC power supply and a resistor.

In this circuit, a constant electric field is formed, outside the power supply, the positive charge flows from the high potential to the low potential through resistance, and in the power supply, the electrostatic force is overcome by the action of the non-electrostatic force of the power supply, and then from the low potential to the high potential, and so on, forming a closed current line. Therefore, in a DC circuit, the role of the power supply is to provide a constant electromotive force that does not change with time, supplementing the Joule heating consumed on the resistor. Alternating current Alternating current is also known as "alternating current", abbreviated as "alternating current".

Generally refers to a voltage or current whose magnitude and direction change periodically over time. Its most basic form is a sinusoidal current. The standard frequency of AC power supply in China is 50 Hz, and 60 Hz in Japan and other countries.

The form in which alternating current changes over time can be varied. Different variations of alternating current have different application ranges and effects. Sinusoidal alternating current is the most widely used, and other non-sinusoidal alternating current can generally be mathematically processed into the superposition of sinusoidal alternating current.

Sinusoidal current (also known as simple harmonic current) is a simple harmonic function of time i=imsin( t+ 0) When the coil rotates at a constant speed in a magnetic field, an alternating current of periodic change in magnitude and direction is generated in the coil. The alternating current used today generally changes its direction and intensity 50 times per second. The electricity we commonly use for lights, motors, etc., is alternating current.

In practice, alternating current is used with symbols"~"Denote. The variation law of current i with time shows that sinusoidal alternating current needs to be described by three physical quantities: frequency, peak and phase.

The basic issues to be discussed in alternating current are the relationship between current and voltage in a circuit, and the distribution of power (or energy). Because alternating current has the characteristics of changing over time, it produces a series of characteristics that distinguish it from DC circuits. The components used in AC circuits are not only resistors, but also capacitive elements and inductive elements.

The battery compartment in the lab is DC and the power supply to the socket is AC.

VDC: DC voltage volts, VAC: AC voltage volts.

DC stands for direct current. A DC power supply is a device that maintains a steady current in a circuit. Such as dry batteries, storage batteries, etc. com stands for public side.

VDC stands for DC power supply, how many volts of voltage, where V its full English name (voltage) means voltage, the unit symbol is volts, DC is the meaning of DC power supply, such as DC 24 volts, it can be marked as: 24VDC.

VAC is AC voltage and VDC is DC voltage! The VAC and VDC on the capacitor indicate that the working environment is different! One works in an alternating current environment and the other works in a direct current environment!

VAC is delivered.

Flow voltage, VDC is DC voltage! VAC and VDC representations on the capacitors.

The working environment is different! One version works in the right environment of alternating current, and the other works in the environment of direct current!

VDC is the meaning of DC voltage, and VAC is the meaning of AC voltage.