AC current - what is it? Explained in a simple and understandable way

When it comes to electricity, it is either AC or DC. We explain the difference and show you in which situations which electricity is helpful.

AC and DC current: what's the difference?

The abbreviation AC stands for "Alternating Current". In German we say AC. The abbreviation DC stands for "Direct Current".
With alternating current (AC), the polarity of the current is changed regularly. This creates a balance of negative and positive direction.
Due to numerous advantages, AC electricity is mainly used worldwide. AC also comes from the socket in Germany.
This alternating current changes its direction (polarity) 50 times per second. The term 50Hz is used as a technical term.

In everyday life, however, we also encounter DC more and more. Since batteries can be charged better with direct current, we need DC current for smartphones, laptops and the like.
However, since AC power comes from the socket, the DC power must be converted. This is done using the small or large power supply unit that connects the socket to the device.
You don't have to worry about accidentally plugging an AC device into DC power, or vice versa. The connections are always designed so that such problems cannot arise.

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Next we'll tell you how to charge your phone without electricity. In addition to cool practical tricks, we also have curious home remedies.