# AQA GCSE Physics Energy transfers in everyday appliances Focus Questions

Focus Questions for AQA GCSE Physics Energy transfers in everyday appliances

1. What are everyday appliances designed to do?
2. Give two examples of everyday appliances?
3. What 2 things does the amount of energy transferred by an appliance depend on? One begins with t and the other a p.
4. Describe the energy transfers that are taking place in an electric fan.
5. Describe the energy transfers taking place in an electric oven.
6. What does a.c. stand for (please don’t say air conditioning).
7. What is done when electrical charge flows around a circuit.
8. Have a look at these two equations.
9. Rearrange so that P=, t =, Q = and V =.
10. What are the units of: –
1. Energy transferred.
2. Power
3. Time
4. Charge flow
5. potential difference?

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# AQA GCSE Physics Power focus questions

## Focus questions on power for AQA GCSE Physics

1. Copy and fill in the blanks. Power is defined as the __________ at which energy is ___________or the rate at which _______ is done.
1. Consider these equations.
2. Can you see by comparing the equations that work done = energy transferred?
3. What is the unit of power?
4. What is the unit of energy?
5. What is the unit of work done?
6. What is the unit of time?
7. Rearrange the equations so that. E =, t =
8. Rearrange the equations so that W = and t =
9. Copy the following: An energy transfer of 1 joule per second is equal to a power of 1 watt.

# AQA GCSE Physics Changes in Energy Specification Focus Questions

## Focus Questions

1. Write down an equation to calculate the kinetic energy of a moving object.
2. What is the unit of kinetic energy?
3. What is the unit of mass?
4. What is the unit of velocity?
5. Rearrange this equation so that mass and velocity are the subject of the equation. E.g. mass =, velocity =. The velocity one must include a square root.
6. Write down an equation to calculate the amount of elastic potential energy stored in a stretched spring.
7. What are the units of elastic potential energy?
8. What are the units of the spring constant?
9. What are the units of extension?
10. Rearrange this equation so that spring constant and extension are the subject of the equation. E.g. k = , e =. For extension, you will have to include a square root.
11. What does the spring constant tell you about? The amount of force needed to stretch a spring by………………?
12. Write down an equation to calculate the amount of gravitational potential energy gained by an object raised above ground level.
13. What is the unit of mass?
14. What is the unit of height?
15. What is the unit of gravitational field strength?
16. Rearrange the equation for mass.
17. Rearrange the equation for the height
18. Rearrange the equation for gravitational field strength.
19. What does a gravitational field strength of 10 N/Kg mean?