Ohm's Law it's a very basic rule for circuits but indeed it's very essential to calculate voltage, resistance, and current in a circuit. When circuit gets more and more complex later we also notice that when we calculate voltage, resistance and current we are still using Ohm's Law. This is the main reason I wanted to mention what I learned about the Ohm's Law in the class.
Ohm's Law has begins from one equation that is effect = cause opposition, every conversion of energy from one form to another can be related to this equation (p. 101). In electric circuits, the effect we are trying to establish is the flow of charge, or current (p.102). Current is a reaction for applied voltage but not a motion but it's not a factor to get system in motion. Voltage is amount of potential energy between two points on a circuit; one point has more charge than another. One good example is that water = charge, pressure = voltage, and flow = current. Resistance determine how much charge will flow in a circuit, for example a circuit with higher resistance will allow less charge to flow, meaning the circuit with higher resistance has less current flowing through it. The basic formula for Ohm's law will be V = IR or I = V/R or R = V/I, by this formula we understand the basics of Ohm's law and also we refer Ohm's law back to all circuit calculations. .
Series Circuit and Parallel Circuit.
The first thing we have to know about circuit is what a node is, its just the electrical junction between two or more components (Sparkfun Electronics). Once we understand about the node makes it half way of understand the difference between series and parallel. Secondly we need understand how current flows through a circuit. Current flows from a high voltage to a lower voltage in a circuit (Spark fun electronic). In series circuit resistance will just be RT = R1 + R2 + R3 and so on, also in series circuit current will be different compare to parallel circuit.