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UNIT FIVE: Electricity and Magnetism

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UNIT FIVE: Electricity and Magnetism. Chapter 16 Electricity Chapter 17 Magnetism. Chapter Sixteen: Electricity. 16.1 Charge and Electric Circuits 16.2 Current and Voltage 16.3 Resistance and Ohm’s Law 16.4 Types of Circuits. Chapter 16.2 Learning Goals.

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Presentation Transcript
unit five electricity and magnetism
UNIT FIVE: Electricity and Magnetism
  • Chapter 16 Electricity
  • Chapter 17 Magnetism
chapter sixteen electricity
Chapter Sixteen: Electricity
  • 16.1 Charge and Electric Circuits
  • 16.2 Current and Voltage
  • 16.3 Resistance and Ohm’s Law
  • 16.4 Types of Circuits
chapter 16 2 learning goals
Chapter 16.2 Learning Goals
  • Explain how current flows in an electric circuit.
  • Define voltage and describe how it is measured.
  • Discuss the function of a battery in an electric circuit.
investigation 16a
Key Question:

How do you measure voltage and current in electric circuits?

Investigation 16A

Electricity

16 2 current and voltage
16.2 Current and voltage
  • Electric current is measured in units called amperes, or amps (A) for short.
  • One amp is a flow of a certain quantity of electricity in one second.
  • The amount of electric current entering a circuit always equals the amount exiting the circuit.
16 2 voltage
16.2 Voltage
  • Voltageis a measure of electric potential energy, just like height is a measure of gravitational potential energy.
  • Voltage is measured in volts(V).
  • A voltage difference of 1 volt means 1 amp of current does 1 joule of work in 1 second.
16 2 voltage1
16.2 Voltage
  • A difference in voltage provides the energy that causes current to flow.
16 2 voltage2
16.2 Voltage
  • A useful meter is a multimeter, which
  • can measure voltage or current, and sometimes resistance.
  • To measure voltage, the meter’s probes are touched to two places in a circuit or across a battery.
16 2 batteries
16.2 Batteries
  • A batteryuses stored chemical energy to create the voltage difference.
  • Three 1.5-volt batteries can be stacked to make a total voltage of 4.5 volts in a flashlight.
16 2 batteries1
16.2 Batteries
  • A pump is like a battery because it brings water from a position of low energy to high energy.
16 2 measuring current
16.2 Measuring current
  • If you want to measure current you must force the current to pass through the meter.
  • Multimeters can measure two types of current: alternating current (AC) and direct current (DC).
16 2 measuring current1
16.2 Measuring current
  • Circuit breakers and fuses are two kinds of devices that protect circuits from too much current by making a break that stops the current.