What is Ground in Electronic Circuits?
We think most people who have started learning electronics may confuse about ground at one point or another. Ground is different from other components in electronics and in high voltage electrical systems. Usually in electronics, ground is just a name we give to a certain point in the circuit. In a circuit with one battery (with a positive and a negative terminal), we usually refer to the negative terminal as ground.
To see how the current flows in a circuit diagram with ground symbols, just connect all the points that have ground symbols. That is what you do when you build the circuit. In some schematic diagrams it is common to find a connection to a positive terminal, a negative terminal, and a ground terminal. But how does this work?
In this scenario, the ground is the middle-point between the positive and the negative terminal. If the voltage measured between the negative and the positive terminal is 18 volts, this means the ground would be at 9 volts. But in this case, we would call the positive terminal 9 volt and the negative terminal -9 volts. And the ground terminal we would refer to as 0 volt.