**Difference between AC and DC Current Explained. O**n the last added Ohms video we looked at voltage, power and current … and you might remember this animation One problem with this animation is that the voltage source shown is the source of an AC.

The current flow is shown as DC so let’s talk about the difference between IC and DC.

The letter DC means direct current and this usually means that the electrons flow in the same direction.

AC means alternating current and this means that the flow of electrons changes.

## Difference between AC and DC Current Explained

** Now, things can start to get a bit confusing fro**m here. It is an AC voltage source so it is both AC and voltage. How can the voltage and current be the same? Well, it turns out that we use AC and DC briefly in voltage as well as current.

**So, in other words, is the AC voltage**, or current, voltage, or current, which varies. DC voltage, or current, is the voltage, or current, that is constant.

**Okay, so let’s take a closer look at these two start**ing with DC. Check the AA, or LR6, battery. It provides 1.5 volts. For example, the circuit is going to be a DC motor such that you get a toy car.

When we enter the battery circuit, the motor starts to flow in one direction, turning.

** If we draw a graph, where the vertical ax**is is the voltage and the horizontal axis is the time, then we can see that the voltage at this point is stable.

**Since it is a battery, eventually, it will run out** of energy. And its output voltage will drop. So we know that the voltage will change over time, but the polar age remains the same.

**So what is precision? The polarity of the well d**efines the positive direction and the positive voltage for the battery produces a positive voltage.

** So what if we turn this battery around? W**ell, it reverses its potential, which means that the current will flow in the opposite direction as before, causing our motor to rotate in the opposite direction.

**Well, then we move to AC and in this case,** we will use a light bulb and a North American AC socket, because well, I live in North America! Treat the circuit when we activate the switch.

** Let’s break down what we are seeing b**y reusing the voltage graph. Note how the current is flowing in one direction and the light bulb illuminates as the voltage increases. Once the voltage reaches its peak, the current flow remains the same but the voltage starts to drop.

And the light bulb fades. Once we reach zero voltage, the polarity of the voltage changes which causes the current to flow, and when the voltage gets closer to its height, the bulb brightens and then goes down.

First, is the change from start to finish called a cycle? The frequency at which the cycle repeats is the frequency. The frequency is now measured by the unit “Hz”, which means cycles per second.

Different parts of the world use different frequencies for their AC systems and this can be 50 or 60 Hz. What this means is that the cycle repeats itself at least 50 times in a second.

B found out, this rate is so fast that our lazy human eyes see it as a constant light! To sum up, when AC and DC abbreviations include the word “current”, they can be used to describe different types of voltage and current.

DC voltage does not fluctuate while DC current flows in one direction AC voltage changes over time and current flow can change in the alternate direction.