Electrical Energy

HideShow resource information
  • Created by: Maddi
  • Created on: 20-04-14 18:50
Why are electrical appliances so useful?
Electrical appliances can transfer electrical energy into useful energy at the flick of a switch.
1 of 13
What do we use most everyday electrical appliances for?
Uses of everyday electrical appliancesincluding heating, lighting, making an object move and creating sound and visual images.
2 of 13
How do we choose an electrical appliance for a particular job?
An electrical appliance appliance is designed for a particular purpose and should waste as little energy as possible.
3 of 13
What do we mean by power?
Power is rate of transfer of energy.
4 of 13
How can we calculate the power of an appliance?
_
5 of 13
How can we calculate the efficiency of an appliance in terms of power?
_
6 of 13
How does how powerfull the appliance is affect the rate at which it transfers energy?
The more powerful an appliance, the faster at which it transfers energy.
7 of 13
What is the kilowatt-hour?
The kilowatt-hour is the energy supplied to a 1kW applaince in 1 hour.
8 of 13
How can we work out the energy used by a mains appliance?
E = P x t
9 of 13
How is the cost of mains electricty worked out?
_
10 of 13
What do we mean by cost effectiveness?
Cost effectiveness means getting the best value for money.
11 of 13
How can we compare the cost effectiveness of different energy-saving measures?
To compare the cost effectiveness of different appliances, we need to take account of costs to buy it, running costs and other costs such as environmental costs.
12 of 13
What might the environmental costs include?
The removal or disposal of old equipment and environmental taxes.
13 of 13

Other cards in this set

Card 2

Front

What do we use most everyday electrical appliances for?

Back

Uses of everyday electrical appliancesincluding heating, lighting, making an object move and creating sound and visual images.

Card 3

Front

How do we choose an electrical appliance for a particular job?

Back

Preview of the front of card 3

Card 4

Front

What do we mean by power?

Back

Preview of the front of card 4

Card 5

Front

How can we calculate the power of an appliance?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Electrical Energy resources »