* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Name - OnCourse
Power engineering wikipedia , lookup
Electric battery wikipedia , lookup
Fault tolerance wikipedia , lookup
Electrification wikipedia , lookup
Electric machine wikipedia , lookup
Current source wikipedia , lookup
Electronic engineering wikipedia , lookup
Ground (electricity) wikipedia , lookup
Stray voltage wikipedia , lookup
History of electric power transmission wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Two-port network wikipedia , lookup
Electrical substation wikipedia , lookup
Mains electricity wikipedia , lookup
History of electromagnetic theory wikipedia , lookup
Regenerative circuit wikipedia , lookup
Opto-isolator wikipedia , lookup
Alternating current wikipedia , lookup
Circuit breaker wikipedia , lookup
Earthing system wikipedia , lookup
Flexible electronics wikipedia , lookup
Name:______________________________________ Period:_______ Date:________ Chapter 20 – Electricity Sections 2 & 3 (Electrical Currents & Circuits) Flow of a Charge Electric Current ____________________________________________________ ____________ ____________________________________________________ Electric charges will flow continuously only through a _________________________ called a ________________. How a current flows: A simple electric circuit contains: a source of electrical energy = ____________, & electrical conductor, = __________________. In the figure, a ___________ ___________ is formed by wires connecting a ____________ to a _____________. Voltage In an electric circuit, a battery increases the ______________________________ of electrons. Voltage: ___________________________________________ _________________________________________________ _________________________________________________. Voltage is measured in ______________. Batteries Chemical reactions in batteries produce ____________________________________ ________________ which cause electrons to move from the _______________ to ________________ terminal. Batteries contain only a limited amount of the chemicals needed to create this electric field. A battery is “dead” when ______________________________________________ ,_________________________________________________________________ Resistance Resistance _________________________________________________________ _________________________________________________________________. The unit for resistance is the ______. ________________ generally have much higher resistance than ________________. Ohm’s Law Ohm’s Law states: ______________________________________________ According to Ohm’s Law, when the _________ in a circuit increases the ___________ increases. Example – _________________________________________________________. Electrical Circuits: A closed path that – __________________________________________________ __________________________________________________________________ If the path is broken… _______________________________________________. There are two types of circuits we will build: 1) _______________________ 2) _______________________ Series Circuits If all the parts of an electric current are connected one after another, the circuit is a _______________ _______________. In a series circuit, there is only __ ________ for the current to take. Advantage – ________________________________________. Disadvantage #1 – ______________________________________ _____________________________________________________. Disadvantage #2 – __________________________________________________ _________________________________________________________________. Why? ___________________________________________________________. Parallel Circuits In a parallel circuit, the different parts of the circuit are on ___________________. In a parallel circuit, there are ___________________________ for current to take. Disadvantage – _______________________ ___________________________________. Advantage #1 – ________________________________, ______________________________________________. Advantage #2 – _________________________________ ______________________________________________. Why? Lab Activity 1. Build a Series Circuit Using the two batteries and three bulbs at your station, build a Series Circuit with the people at your lab station. Take turns building the circuit. Draw your circuit below: 2. Build a Parallel Circuit Using the two batteries and three bulbs at your station, build a Parallel Circuit with the people at your lab station. Take turns building the circuit. Draw your circuit below: Chapter 20 – Electricity Sections 2 & 3 (Electrical Currents & Circuits) – Review Questions Review Question 1 Compare and contrast an electric discharge with an electric current. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Review Question 2 Describe how a battery causes electrons to move in a circuit. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Review Question 3 Compare the current in two light bulbs wired in a series circuit. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Review Question 4 Explain why a building is wired using parallel circuits rather than series circuits. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________