P1.3 Electrical appliances Flashcards
1
Q
What does the amount of energy an appliance transfers depend on?
A
- How long the appliance is switched on for
- Its power
2
Q
What does 1 Watt equal?
A
1 joule per second
3
Q
1 KW =?
Watts
Joules per second
A
1 KW = 1000 Watts = 11000 Joules per second
4
Q
What does 1 unit of electrical energy used equal in Kilo-watt hours?
A
1 Kilo-watt hour
5
Q
How do you find the units of electricity used?
A
Power (KW) x time (hours)
6
Q
How do you find the cost of electricity used?
A
Units x cost per units
7
Q
How do you find the cost of an individual appliance/device?
A
cost (p) = power (kW) x time (hours) x electricity unit cost (p/unit)
