1. Power Circuit
By: AAA

2. A parallel circuit is a closed circuit in which the current divides into two or more paths before recombining to complete the circuit. Each load connected in a separate path receives the full circuit voltage, and the total circuit current is equal to the sum of the individual branch currents

3. The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit. This is because there are only two sets of electrically common points in a parallel circuit, and voltage measured between sets of common points must always be the same at any given time. Therefore, in the above circuit, the voltage across R1 is equal to the voltage across R2 which is equal to the voltage across R3 which is equal to the voltage across the battery. This equality of voltages can be represented in another table for our starting values:

4. Before we get into a definition of a parallel circuit, let's do a quick review of some electrical circuit fundamentals, mainly voltage, current, resistance, and a few laws. Here are the ones that we'll need:
Voltage (V, in volts - V) is the electrical force responsible for making electrical charge move.
Current (I, in amperes - A) is a measure of the movement of electrical charge over time.
Resistance (R, in ohms) is a measure of how much a component opposes the movement of the current through it.
Kirchoff's Current Law (KCL) is simply an affirmation that charge must be conserved, and so the sum of the currents going into a circuit node (a point in the circuit where two or more components are connected) must equal the sum of the currents going out of the same node:
Kirchoff
Kirchoff's Voltage Law (KVL) says that if you sum the voltages around any loop in a circuit, you will get zero:

5. Videos https://www.youtube.com/watch?v=OoPCDiMF108