Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. When is 'work done' in terms of appliances?
   • Work is done when charge flows in a circuit.
2. Which equation is use to calculate the amount of energy transferred by electrical work?
   • The amount of Energy transferred by electrical work can be calculated using the equation: Energy transferred = power x time
3. In terms of charge flow and potential difference, how can energy transferred be calculated?
   • Energy transferred can be calculated by: Energy transferred = charge flow x potential difference
4. How is the power of a circuit device related to the energy transferred over a given time?
   • P = Et, So Power is calculated by multiplying the Energy being transferred over the time taken.
5. What examples show the relationship between the power ratings for domestic electrical appliances and changes in stored energy when they are in use?
   • when an appliance such as a light bulb is switched on the electrical Energy will transform into thermal Energy which is (wasted Energy) and light Energy which is (useful Energy)