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Electronics/Circuits.md
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@ -8,7 +8,7 @@ tags: [electricity, electrical-fcircuits]
An electrical circuit is a set of electrical components connected in such a way that current flows in a loop from a voltage source, through the cirucit elements and back to the source.
Below is a basic circuit representing a 9-volt [battery]() with a 10,000$\Omega$ resistor attached accross its terminals.
Below is a basic circuit representing a 9-volt [battery]() with a 10,000$\Omega$ resistor attached accross its terminals. Through the application of [Ohm's Law](/Electronics/Physics_of_electricity/Ohms_Law.md) we can determine that the maximum current will be 0.9 miliamps.
![](/img/basic-circuit.png)
@ -17,5 +17,3 @@ Below is a basic circuit representing a 9-volt [battery]() with a 10,000$\Omega$
A circuit with a break in its loop is called an **open circuit**. When a circuit is open, no current flows.
A **short circuit** is a path in a circuit that allows current to flow with little or no resistance. This is usually unintentional and results in excessive current flowing through the circuit. A short circuit is the opposite to an open circuit. With an open circuit there is an infinite resistance between the two terminals.
## Ground

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Electronics/Ground.md
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@ -4,3 +4,17 @@ categories:
- Electronics
tags: [physics, electricity]
---
# Ground
The term 'ground' is used as a general reference for 'zero potential': the point in an electrical circuit where there is no potential difference between the positive and negative terminals of the voltage source.
As a consequence of the lack of potential, ground is a point at which no current can be generated.
The term originates from domestic electrical systems where the circuit box is literally attached to the ground (represented by the green and yellow ribboned wires in plug sockets and light fixtures etc) where current is discharged to prevent appliances emitting electrical shocks.
In circuit diagrams with simple DC current, ground is taken to be the negative terminal of the voltage source.
The symbol for ground in circuit diagrams:
<img src="/home/thomas/repos/computer_science/img/ground-symbol.png" width="300px">