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Slide 1

Chapter 5

Using Electricity in the Home

Slide 2

In order to do work a force must move through a distance.

Kinetic energy involves movement or use

Potential energy means that it can be used

On Earth we can convert our weight in kilograms to Newtons by multiplying by 10 i.e One kilogram becomes 10 N

Slide 3

Energy = Voltage X Current X time

The units for energy are joules (J)

Power = energy / time

Power = Voltage (v) X Current (I)

Slide 4

Hydro bills are established by finding out how many kilowatt hours of electricity your household has used in a given time.

1 kWh = kilowatts X time (hours)

1 kWh = 1 000 Watts X 1 hour

1 kWh = 1 000 W X 3 600 seconds

Slide 5

Reading the Meter – always use the smallest number

Slide 6

This reading should be 88762

Slide 7

This is a comparison of the amount of energy obtained as compared to the amount of energy put into the system

Efficiency = energy output / energy input

To convert it to a percentage just multiply the answer by 100 %

Slide 8

The wires coming into a house include a black, a red and a white.

The black and the red wires are “hot”

The white wire is neutral – leading to a ground

The black is rated as being 120 v from the neutral

The red is rated as being 120 v from the neutral

Slide 9

Red = In at 120V

Black = Out at 120V

Potential difference = 240V

Slide 10

Slide 11

In North America, the current alternates back and forth in what we call cycles per second

1 cycle/second = 1 Hertz

Electrical frequency in North America = 60 Hz

Slide 12

- Work = force (Newtons) X distance (m)
- House Hold Energy Consumption
- Efficiency
- House Hold Wiring
- Electricity Entering Your House
- Household Wiring is in Parallel
- Alternating Current Frequency
- The Service Panel
- The Neutral Wire (White)
- Three Prong Plug
- Circuit Breakers
- Circuit breakers - Details
- Fuses are Older than Circuit of Breakers
- GFCI – Ground Fault Circuit Interrupter
- House Hold Wiring
- Three pronged plug
- Grounding the Current

- Understanding Heat Transfer, Conduction, Convection and Radiation
- History of Modern Astronomy
- The Effects of Radiation on Living Things
- Waves & Sound
- Upcoming Classes
- Newton’s Law of Gravity
- Ch 9 Nuclear Radiation

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