Mr. Shanks' Class - Home



ELECTRICITY PART IIINow that we're familiar with the vocabulary of circuits, the parts of a circuit and how to draw them, we need to figure out how to calculate the values. Recall, there are two kinds of circuits we're going to be looking at:_____________ and _______________Equations for a Series Circuit1) Voltage Finding the Voltage of a Series Circuit is very straight forward. You simply add all the voltages across each of the loads in the circuit together. Equation: 2) Current Current in a Series Circuit is the same throughout because the electricity can only travel in a straight line around the circuit.Equation: 3) Resistance Finding the Resistance of a Series Circuit is the same as the resistance of all the individual resistors added up.Equation:Sample Problem445770074930-990600902335Equations for a Parallel Circuit1) Voltage Voltage in a Parallel circuit is divided up equally, so all branches of the circuit have the same push on the electrons. Equation:2) Current Unlike a Series Circuit, in a Parallel Circuit the electricity that travels through one branch is different than the electricity that travels through another. So to find the total current, you must add all the individual currents of each branch together. Equation: 3) Resistance Resistance in Parallel Circuits is MUCH more difficult to figure out through reasoning. The individual resistors are each on different branches. So, electricity traveling through each branch will find different degrees of resistance. As we've learned, Electricity will always take the path of least resistance, and so we must represent the resistance of each single resistor as being divided by 1. Equation: Sample Problem429577580645-1028700711200-409575-164465 The Human Brain is an Intelligent Machine In many ways, similarities can be drawn between the human brain and a circuit. * It sends electrical signals ________________________________________* It receives __________________ which controls how much signal is used, like a ___________* It increases and decreases _____________________ depending on the input from the system* It can return information(______________) back to the original source in a "feedback loop"Our brains send electrical charges from one point to another but our brain uses _____________________ and ________________ instead of induction or friction335280034925How Do Fluorescent Lights Work? These lights heat up _______________ to vapour form, which causes it to ionize (lose electrons). This causes the Mercury vapour to emit light, but the light can't be seen because it is in the __________ range, which can't be seen by the human eye. The glass on the inside of the bulb is covered in a _________________ which picks up the _______ light given off by Mercury and releases the energy as visible light. 3895725147955This is the same technology used to make ___________________________________________ (CFLs)LEDBut now, the next development in lights is the ____________________________ (LED)There are several advantage to LED lights, importantly, less _________________and longer ___________________________________ , roughly _____________ hours. 281940088265-819150207010What is the difference between AC and DC? AC stands for _________________________________ which means that electricity travels through one direction, ________________________, and then electricity travels through the other way. This is the kind of circuit you would see in most ______________________________________ . DC stands for ________________________________ which means that the electricity only travels in one direction, _______________________________________. This is the circuit you 1600200857254495800238125would see in most _______________________________________________ , and that's why they need to be replaced. ................
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