april 13, 2005created by kristy lynn price current electricity tlw contrast a series circuit and a...

April 13, 2005 Created by Kristy Lynn Price

Current Electricity

TLW contrast a series circuit and a parallel circuit.


Electricity needs a complete path along which to

follow.


How Does Electricity Flow?

• Electricity must follow a complete path

• Circuits can be closed, or complete, or they can be open, or incomplete

• The path that electricity can move through is called a circuit

• The electricity that flows through a circuit is called current electricity


Series Circuit

• Two objects are connected in a single path

• Electricity can flow in only one way

• Refer to pages F82 and F83

• Closed Circuit: when both bulbs are in place– Needed in order for electricity to flow

• Open Circuit: created when one bulb is removed– Current cannot complete its path

• The bulbs are dim when lit


Series Circuit

+-D-cell

Closed Circuit

+-D-cell

Open Circuit

Electricity can flow Electricity cannot flow


Parallel Circuit

• It connects each object to the cell separately

• Provides two paths by which current can flow

• When one bulb is removed from a parallel circuit, the other bulb is still a part of a complete circuit– That is why it remains lit

• The bulbs are brighter than in a series circuit

• What advantage can a parallel circuit have?


Parallel Circuit

+-D-cell

+-D-cell


Comparison

Series Parallel

Connection Both bulbs are on the same circuit

Each bulb is on a separate circuit

Removing

one bulb

Both bulbs go off Only the removed bulb goes off

Brightness Dim Bright


Review

• Complete workbook page 318

• What is a circuit?

• What are two ways that a circuit can be arranged?

• How is a parallel circuit different from a series circuit?

• How are the circuits similar?

april 13, 2005created by kristy lynn price current electricity tlw contrast a series circuit and a...

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