energy transfers in appliances

Question 1

how do kettles transfer energy?

Answer 1

• electrically from the mains ac to the thermal energy store of the heating element inside the kettle

Question 2

how do fans transfer energy?

Answer 2

transferred electrically from the battery to the kinetic energy store of the fan’s motor

Question 3

what does the amount of energy an appliance transfers depend on?

Answer 3

• how long the appliance is switched on for
• the power of the appliance

Question 4

what happens to the energy transferred if the power is higher?

Answer 4

it is higher

Question 5

power rating

Answer 5

the maximum amount of energy transferred between stores per second when the appliance is used

Question 6

what happens when an electrical charge goes through a change in pd?

Answer 6

energy is transferred

Question 7

describe the path of charge

Answer 7

-energy supplied to charge at the power source to raise it through a potential
-charge gives up this energy when it falls through any potential drop in components
-means that a battery with a bigger pd will supply more energy to the circuit for every coulomb of charge that flows round it as the charge is raised higher at the start

Question 8

when is work done?

Answer 8

when charge flows through a circuit