Pretty obviously, different electrical devices need different amounts of electrical power. Generally:
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Devices that heat consume the most power.
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Devices that produce motion consume less.
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Devices that produce light consume less still.
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Devices that produce sound consume least.
The above are general. A high powered speaker or a blender for example, may consume more power than a power saving light bulb. The power requirements of some common appliances are shown below. Notice that some devices consume power to produce more than one of the above – heat is always a by product.
Heating Appliances
Power Consumed (Watts)
Hot Plate
1200
Coffee Maker
800
Dishwasher
1300
Iron
1000
Toaster
1000
Microwave
750
Washing Machine
500
Devices that Produce Motion
Blender
300
CD Player
20
Printer
100
Table Fan
20
Drill
1000
Disc sander
1200
Vacuum Cleaner
1400
Devices that Produce Sound
Clock Radio
1
Stereo
30
Others
Light Appliances
CRT Television
200
Incandescent Light Bulb
100
Efficient Light Bulb
20
Others
Laptop
50
Desktop PC
300
Satellite Dish
30
VCR
40