Electricity Unit J. Do Now: DRB5faU DRB5faU.
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Transcript of Electricity Unit J. Do Now: DRB5faU DRB5faU.
Electricity
Unit J
Do Now:
• https://www.youtube.com/watch?v=igK-DRB5faU
Measuring Electricity
• Ammeter – measures electricity – Measures current in Amps– Current – moving electricity
Components
• Parts of a circuit:
Questions?
• Does the current change be having an ammeter in the circuit?
• Does the current change by having an extra bulb?
Do Now:
• Current is the amount of electricity flowing through a circuit.
• What happens if the current is to high?
What Happens When you heat Steel Wool?
• https://www.youtube.com/watch?v=v7M18IObc6c
Resistor
• Resistor – makes the current smaller using resistance
• Why is reducing current important?– Metal gets hot as current runs through it
Fuses
• Fuse – a piece of wire designed to melt if the current
• Typically located in the plug• Every plug has a different
fuse, depending on how much current the appliance can take
Plugs
Do Now:
• Complete the worksheet and place it into your book.
• First person to finish and glue in gets 2 house points
Series and Parallel Circuits
• Simple Circuit – Only cell connected to bulb
• Series Circuit – Everything connected in a loop
• Parallel Circuit – “Branches” to connect everything
Current Flow
Benefits of a Parallel Circuit
• Current flows through the branches, even if one branch is broken
Current in the Circuit
• Parallel Circuits – divided amps• Series Circuits – equal amps
• https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc
Do Now:
• Open your books to page 143, answer questions 3 and 4 after reviewing the circuit diagrams
Electricity Inside You
• Impulses – electrically signals sent through your body to your brain
• Nerves – impulse travel along your nerves
Pacemakers
• Impulses keep your beating, when they cannot reach your heart properly you may have to get a pacemaker to keep your heart beating properly
When your heart stops beating…
• Doctors can use a defibrillator to “restart” your heart– It sends an electrical current through your body
Electric Shock
• Electric Shock – when electricity is sent through the body by an outside source
Natural Resistor
• Your body acts as a natural resistor• When wet, the resistance is lowered– You will be more affected by an electric current
Activity:
• Discuss with a partner:• How can electrical shocks be useful?