2.3 Energy Transfers
Cards (26)
- What is power defined as in electrical terms?
- What is the unit of power?
- What factors does the power of a device depend on?
- How is power related to energy in terms of units?
- How do you calculate the potential difference if power and current are known?
- What does the voltage across an electric device depend on?
- What is the formula for power in terms of current and resistance?
- How do you calculate the power through a resistor?
- What is the energy transferred equation?
- What does the energy transferred depend on?
- How can energy transferred also be expressed in terms of charge?
- What is the relationship between energy transferred and work done?
- What happens to energy as charge flows through a circuit?
- How do you calculate energy transferred when current and potential difference are known?
- What is the formula for calculating energy transferred in joules?
- How do you convert time from minutes to seconds in calculations?
- What is the power rating of an appliance?
- What information is typically found on an appliance's power rating label?
- Why is it important not to exceed the voltage on an appliance's label?
- What does the National Grid do?
- What are step-up transformers used for in the National Grid?
- How does increasing potential difference affect energy loss in wires?
- What is the role of transformers in the National Grid?
- What type of current is produced in power stations?
- How does a step-up transformer work?
- How does a step-down transformer function?