| The process by which electrical appliances convert electrical energy into other forms such as thermal or kinetic energy. | Energy Transfer in Electrical Appliances |
| What is the primary function of electrical appliances? | To transfer energy from electrical sources to perform specific tasks. |
| Work is done when charge flows through a circuit, resulting in energy transfer. | Work Done in Electrical Circuits |
| Why is work done in electrical circuits? | To transfer energy within electrical appliances. |
| Different electrical appliances transform electrical energy into various forms, such as thermal or kinetic energy. | Examples of Energy Transformation |
| How does a heating device transform energy? | It transfers energy to thermal energy stores. |
| The amount of energy transferred by an appliance depends on its power and the duration it is operational. | Power and Energy Transfer |
| What factors influence the amount of energy transferred by an appliance? | Power and the duration of usage. |
| The longer an appliance is used, the more energy it transfers. | Relation Between Duration and Energy Transfer |
| How does the duration of usage affect energy transfer in appliances? | The more extended the usage, the greater the energy transfer. |
| The power of an appliance determines the rate of energy transfer. | Influence of Power on Energy Transfer |
| How does the power of an appliance affect energy transfer? | Higher power results in a faster rate of energy transfer. |
| The process of converting electrical energy into other usable forms in appliances. | Conversion of Electrical Energy |
| Provide an example of converting electrical energy into kinetic energy. | A motor transferring energy to kinetic energy stores. |
| Indication of the maximum power an appliance can safely operate at. | Power Ratings of Domestic Appliances |
| What does the power rating of a domestic appliance tell us? | The maximum power the appliance can safely operate at. |
| The higher the power rating, the more energy the appliance transfers each second. | Relationship Between Power Rating and Energy Transfer |
| How does the power rating relate to the energy transfer of an appliance? | A higher power rating corresponds to more energy transferred per second. |
| Illustration of a power rating, e.g., a maximum power rating of 2900 W. | Example Power Rating |
| If an appliance has a power rating of 2900 W, what does this mean? | It can safely operate at a maximum power of 2900 joules per second. |
| The power rating expressed in terms of energy transfer per second, e.g., 2900 J/s. | Power Rating in Joules |
| How is the power rating of 2900 W related to energy transfer? | It means the appliance transfers 2900 J of energy per second. |
| Another way to express power, indicating the rate at which energy is transferred. | Energy Transfer Rate |
| What does the energy transfer rate of an appliance describe? | The rate at which energy is transferred, often measured in joules per second. |
| The power rating indicates the maximum power an appliance can safely handle. | Maximum Safe Operation |
| Why is the power rating important for the safe operation of an appliance? | It defines the maximum power at which the appliance can operate safely. |
| Electricity can come from an a.c. (alternating current) or d.c. (direct current) power supply. | Types of Electric Power Supply |
| What are the two main types of electric power supply? | Alternating current (a.c.) and direct current (d.c.). |
| A d.c. power supply produces a constant voltage, always positive, causing charge to flow in one direction. | Characteristics of a D.C. Power Supply |
| What is the characteristic of voltage in a d.c. power supply? | Constant and always positive, leading to unidirectional flow of charge. |
| Cells and batteries are examples of d.c. power supplies. | Examples of D.C. Power Supplies |
| What are examples of devices that supply direct current? | Cells and batteries. |
| An a.c. power supply produces an alternating voltage, with rapid changes between positive and negative values. | Characteristics of an A.C. Power Supply |
| How does voltage vary in an a.c. power supply? | Alternates quickly between positive and negative, causing the charge to change direction regularly. |
| On a voltage-time graph, d.c. appears as a straight line at a constant voltage. | Graph Representation of D.C. Power Supply |
| How does the voltage-time graph of d.c. power supply look? | A straight line at a constant voltage. |
| Electricity supplied by the public grid, often a.c., with a standard frequency and voltage. | Mains Electricity |
| What type of power supply is mains electricity, and what are its standard specifications in the UK? | Mains electricity is a.c., with a frequency of 50 Hz and a voltage of about 230 V in the UK. |
