power of electrical appliances Flashcards
1
Q
what are electrical appliances designed to do
A
transfer energy to components in the circuit when a current flows
2
Q
how do kettles transfer energy
A
electrically from the mains ac supply to the thermal energy store
3
Q
what does the total energy transferred depend on
A
how long the appliance is on for and its power
4
Q
what is the power if an appliance
A
the energy that it transfers per second
5
Q
what happens the more energy the appliance transfers in a given time
A
the higher its power
6
Q
what is the wrd equation to work out the energy transferred
A
energy transferred = power x time
7
Q
what is the symbol equation for energy transferred
A
E= Pt
