Circuits Electric circuit complete, closed path that electrons

Circuits Electric circuit

complete, closed path that electrons flow through Circuits need three basic parts:

Energy source battery, photocell, generator

Circuits need three basic parts: Load something that uses the energy by changing it into

other forms Circuits need three basic parts:

Wires connect energy source to the load A switch can be used to

open and close a circuit on circuit is closed and electrons

can flow off circuit is open and electrons

cant flow Common Circuit Symbols

How would you draw this diagram? Two main types of circuits:

Series circuit all parts are connected in a single loop

Series circuit A break in the circuit stops the flow of electricity to all other

parts of the circuit Series circuit Multiple light bulbs (loads) share

the current and make the bulbs dimmer So Why Use a Series Circuit?

Useful in burglar alarms Parallel circuit parts are connected side by side

with more than one path to travel through Parallel circuit

A break in the circuit doesnt stop the flow to the remaining devices

Parallel circuit Multiple light bulbs will retain the same brightness

Parallel Circuits The more paths the LESS the resistance

Water example: added pipes coming from a large tank will allow more water to

flow out than a single pipe. Parallel circuit

Each pathway can be separately switched off w/out affecting the others

Series or Parallel Circuit? Series or Parallel Circuit?

Series or Parallel Circuit? Series or Parallel Circuit?

Series or Parallel Circuit? Christmas Lights

What type of circuit wires your house? A few Questions About Circuits

Which circuit has the brighter globe? Why do you think this occurs?

Which circuit has the brighter globe(s)? Why do you think they are brighter? Which circuit has the brighter globes? Why

do you think this happens? If you wanted to light up two globes as brightly as possible using one battery, which

is the better way to do it? Which of the circuits will have the brighter globes?

Which of the circuits will have the brighter globes?

Household Circuit Safety Broken wires, water, or overload can cause circuit failures

which can do a lot of damage Fuses contain a thin piece of metal that

melts if current is too high, opening the circuit Fuses

Has to be replaced to complete the circuit again Circuit breaker

piece of metal bends when it gets too hot which flips a switch and opens the circuit

Circuit breaker Has to be reset to complete the circuit again

GFCI found in individual outlets and acts like a small circuit breaker

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