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Electricity

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by

Paul Sheffield

on 7 January 2014

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Transcript of Electricity

Starter
why do we need electricity?
Discuss!
energy transferred per second
workdone per second
Current X Voltage= Power
COST
WE PAY FOR ELECTRICITY IN UNITS
1 UNIT = 1KWH
1 UNIT COSTS 12p
WORK OUT THE COST OF RAISING THE TEMPERATURE BY 1oC
Power
Image by Tom Mooring
Calculating Power
Electricity
Power
Cost
Efficiency

Practical
draw out the circuit your book
measure the voltage and current
time how long it takes the temperature to rise by 10oC
Calculations
WHAT WAS THE POWER OF YOUR APPLIANCE?
How much energy did your heater use to raise the temperature by 10 oC?

life without electricity
UNITS= POWER (KW) X TIME (HOURS)
Full transcript