Chapter Six: Electricity · 6.1 Charge and Electric Circuits 6.2 Current and Voltage 6.3 Resistance...
Transcript of Chapter Six: Electricity · 6.1 Charge and Electric Circuits 6.2 Current and Voltage 6.3 Resistance...
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Chapter Six: Electricity
6.1 Charge and Electric Circuits
6.2 Current and Voltage
6.3 Resistance and Ohm’s Law - Types of Circuits
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Chapter 6.1 Learning Goals
Define static electricity and discuss its causes.
Explain what it means when an object is electrically charged.
Describe the components of an electric circuit and explain the
difference between a closed circuit and an open circuit.
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6.1 Positive and negative charge
Electric charge, like mass, is also fundamental property of matter.
Inside atoms found in matter, attraction between positive and negative charges holds the atoms together.
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6.1 Positive and negative charge
Whether two charges attract or repel
depends on whether they have the
same or opposite sign.
A positive charge attracts a negative
charge and vice versa.
Two similar charges repel each other.
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6.1 Electrical forces
The unit of charge is the coulomb (C). The name was
chosen in honor of
Charles Augustin de Coulomb (1736-1806), the French
physicist who performed the first accurate
measurements of the force between charges.
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6.1 Static charge
A tiny imbalance in either
positive or negative charge
on an object is the cause of
static electricity.
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6.1 Electric current
Electric current is caused by moving electric charge.
Electric current comes from the motion of electrons.
current
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6.1 Electric Circuits
Wires in electric circuits are similar in some ways to pipes and
hoses that carry water.
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6.1 Circuit diagrams
When drawing a circuit diagram, symbols are used to
represent each part of the circuit.
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6.1 Circuit diagrams
and electrical symbols
Electrical symbols are
quicker and easier to draw
than realistic pictures of the
components.
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6.1 Resistors
A resistor is an electrical device that uses the energy carried by electric current in a specific way.
Any electrical device that uses energy can be shown with a resistor symbol.
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6.1 Open and closed circuits
Current only flows when there is a complete and unbroken path, or a closed circuit.
Flipping a switch to the “off” position creates an open circuit by making a break in the wire.
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6.1 Open and closed circuits
Switches are used to turn electricity on and off.
Flipping a switch to the off position creates an open circuit by making a break in the wire.