* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Series and Parallel Circuits - Ms. Jefford`s Homework Page
Mercury-arc valve wikipedia , lookup
Electrical ballast wikipedia , lookup
History of electric power transmission wikipedia , lookup
Printed circuit board wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Stray voltage wikipedia , lookup
Ground (electricity) wikipedia , lookup
Mains electricity wikipedia , lookup
Buck converter wikipedia , lookup
Fault tolerance wikipedia , lookup
Two-port network wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current source wikipedia , lookup
Surge protector wikipedia , lookup
Electrical substation wikipedia , lookup
Alternating current wikipedia , lookup
Opto-isolator wikipedia , lookup
Rectiverter wikipedia , lookup
Regenerative circuit wikipedia , lookup
Earthing system wikipedia , lookup
Flexible electronics wikipedia , lookup
Electrical wiring in the United Kingdom wikipedia , lookup
Network analysis (electrical circuits) wikipedia , lookup
Series and Parallel Circuits Chapter 9.1 Series Circuits “Charges with ONE path to follow” Example: Christmas Lights! Series Circuits If there is a break in one part of the circuit ... NONE OF THE CIRCUIT WILL WORK! Series Circuit The total voltage in a series circuit is spread across the loads: a voltage drop occurs at each load where some of the total voltage is “lost” i.e. transferred to other forms of energy Voltage here = 4V Series Circuit The current in any part of the series circuit is the same .... since there is only one path for the current to travel Series Circuits Resistance reduces or slows the flow of electrons in a circuit. When more loads are added to a series circuit: the total resistance in the circuit increases the current decreases Parallel Circuits A parallel circuit has multiple paths for current to follow. If there is a break in one part of the circuit, the current in that part of the circuit would stop. Parallel Circuits The voltage in a parallel circuit is the same throughout. Parallel Circuits The current in a parallel circuit is divided among the different pathways that branch off. • A junction point is where a circuit (and the current!) divides into multiple paths or where multiple paths combine Parallel Circuits When loads are added to a parallel circuit, the total resistance is decreased This occurs because more loads also means more paths and more paths creates more routes for the current to flow, which actually reduces the overall resistance This would also cause the total current to increase. Comparing Series and Parallel Circuits Series Circuit in a DVD Player • Remember in a series circuit, if one component ‘breaks’, then none of it works... • If the player stops being able to read a DVD, is it necessary for the circuit component that works the picture and sound to function? • No.... Comparing Series and Parallel Circuits Parallel Circuit in a House • Remember in a parallel circuit, if one component ‘breaks’, then ONLY that part stops working... • If the bedroom light burns out, you would NOT want the entire circuit to stop...it IS necessary for the other components to still function! Comparing Series and Parallel Circuits Flashlight – cells in series Batteries end to end means : ↑ voltage = ↑ current More light!! But... more current means the batteries don’t last as long and need to be replaced more often Lighthouse – cells in parallel Batteries in parallel means less voltage and current is used so it: LASTS LONGER! This means it requires less maintenance which is good if you’re an out-ofthe-way lighthouse... Circuit Breakers A circuit breaker acts as a switch so it can cut off ALL power coming into the house (main circuit breaker) or... It can break the circuit so current can no longer flow through a specific (branch) circuit in your house Circuit Breakers How does it work? Remember a house circuit is a parallel circuit with MANY loads In a parallel circuit, each additional load provides a new path which decreases total resistance and increases total current MORE CURRENT IN WIRES = MORE HEAT IN WIRES TOO MANY LOADS AND = TOO MUCH HEAT TOO MUCH CURRENT FIRE!! So... Circuit Breakers When there is too much current (and heat!) in a circuit breaker, it causes a bimetallic strip to bend, which breaks the connection and stops the current BEFORE there is a fire... Once it’s cooled, you reset the switch and the circuit works again