Series and Parallel Series

A series circuit is a circuit where resistors are arranged in a line, so the current has only one path to take. The current is the same through each resistor. The total resistance of the circuit is found by adding up the resistance values of the individual resistors. The resistance of a series can be found with the equation:

R =  (Individual Resistors resistance).

A parallel circuit is a circuit where the resistors are arranged with one group of ends connected together, and the opposite ends connected together. The current in a parallel circuit breaks up, with some flowing along each parallel branch and re-combining when the branches meet again. The voltage across each resistor in parallel is the same. The resistance of a parallel can be found with the equation:

1/R = 1/ R₁  + 1/R₂ +(other resistors).

#selfie #flashlightselfie #selfiesunday #fizzex

The picture above is a flashlight. There are two batteries in it, arranged in a series. This means current only has one path through the batteries.

Powerful Ohm's

In physics this week, we have been talking about an assortment of electricity-based topics. We learned that pretty much everything we use requires electricity to give it energy to work, and that electric energy powers stuff with currents of energy. This is where Ohm’s Law comes in. This law states that the current through a conductor between two points is directly proportional to the potential difference across to points. This is modeled in the equation: I=V/R.

Another thing we dove more in depth to this week is electric power.

Power (Watts) = Joules/second = current x voltage.

Power is defined as the rate at which energy is utilized. In other words, power is a sense of how energy efficient something is.

The picture below is of a compact fluorescent light bulb and an LED light blub. The LED blub is more energy efficient than the compact fluorescent bulb, because it uses less watts to do its thing. This means that it uses fewer joules per second, and has either a lower electric current or voltage than the compact bulb.

Electricity

What it is:

Electricity is energy. More specifically, electricity is the flow of electrons. Everything is matter, and all matter is is atoms. The nuclei of atoms are positively charged from the protons and surrounded by negatively charged electrons. Sometimes, outside forces cause atoms to lose or gain electrons. When electrons are lost from an atom, an electric current is formed.

Current:

An electric current is the rate at which a charge flows past a circuit.

The equation for calculation current is: I=Q/T. where I=current, Q=charge passing through cross section of wire, and T=time.

Resistance:

Just as current is the rate at which a charge can flow; resistance is the hindrance to the flow of a charge. When electrons flow through wires and collide with fixed atoms. These collisions cause resistance. Resistance is directly related to the total length of the wires and the number of collisions that occur. Resistance can be expressed as: R=p(L/A), where L=wire length, A=area, and p=resistivity.

Why it is important:

Electricity is energy, and is used to power pretty much everything we own now days. From TVs, to lights, to video games; you name it, electricity powers it. But is it all necessary? Ancient people like the Hawaiians lived great lives without electricity, and maybe we could too.

The picture above is a picture of a paper shredder doing what it do. Electricity runs from a current through the wire from the outlet into the shredder, giving it energy to do work, son.

Capacitance

Write a blog about capacitance. What is capacitance?

Capacitance is the property of a system that has the ability to store a charge. Any object that can be electrically charged has capacitance. Capacitance is measured in farads (F), which is coulomb/volts. A capacitor is a device that provides capacitance in an electric circuit by providing a means for storing energy in an electric field between two conducting bodies. A capacitor consists of two conducting plates separated by an insulating layer called a dielectric. When a capacitor is connected in a circuit across a voltage source, the voltage forces electron onto the surface of one plate and pulls electrons off the surface of the other plate resulting in a potential difference between the plates.

The picture below is an electric keyboard. It is an example of a capacitor because it can be electrically charged.