electrical circuits. electrical circuit closed path through which charge can flow a circuit needs:...
TRANSCRIPT
Electrical Circuit• Closed path through which
charge can flow
• A Circuit needs:1. Source of energy (voltage)2. Conductive path for charge to
flow3. Source of resistance (device to
do work)
Dry cell
• Series of chemical reactions causes electrons to flow and accumulate at the (-) terminal– Used in portable electronics
+ terminal
- terminal
Wet Cell
• Has 2 connected metal plates submerged in an electrolyte: solution that conducts electricity
• Ex: Car battery
Circuit Diagrams
• Use symbols to represent parts of a circuit
• Shows one or more complete paths that charge can flow
Series Circuits• Charge has only one path to flow• If one device stops working they
all stop working!• Viewing series circuit
Series Circuits• Adding light bulbs to a series
circuit increases resistance– CURRENT DECREASES, BULBS
BECOME DIMMER
Parallel Circuits• Circuit with two or more paths
for current to flow• If one device stops working the
rest continue to work!
Parallel Circuits
• Viewing Parallel Circuit
• Homes and buildings are wired in parallel
• Bulbs shine brighter in parallel than series– All Directly connected to battery