Describe how different Describe in terms of energy devices, eg a TV, to look at domestic appliances transfer stores the energy transfers that the energy transfers that energy from batteries or a.c. are taking place in a given occur mains to the kinetic energy electrical appliance stating – Investigate how the amount of electric motors or the which energy transfers are useful of energy transferred to an energy of heating devices. and which are wasted. Electrical electrical appliance depends appliances may be either battery The amount of energy an on the amount of time that it or mains operated and may appliance transfers depends is on for by connecting the involve motors or heating on how long the appliance is appliance to a joulemeter. elements. switched on for and the power of the appliance. Describe how the amount of electrical energy transferred depends on the time the appliance is on for and the power of the appliance. 6.2.4.2 Work done when Work is done when charge 1 Describe how work is done when charge flows. flows in a circuit. a charge in a circuit. The amount of energy What are the charge carriers in transferred by electrical work an electric current? Calculating the can be calculated using the amount of energy How does a moving charge do equation: transferred. work? Equations for What can moving charge do? energy transfer Describe, with examples, the should be known. relationship between the power ratings for domestic electrical appliances and the changes in
Describe how different domestic appliances transfer energy from batteries or a.c. mains to the kinetic energy of electric motors or the energy of heating devices. The amount of energy an appliance transfers depends on how long the appliance is switched on for and the power of the appliance. Describe in terms of energy stores the energy transfers that are taking place in a given electrical appliance – stating which energy transfers are useful and which are wasted. Electrical appliances may be either battery or mains operated and may involve motors or heating elements. Describe how the amount of electrical energy transferred depends on the time the appliance is on for and the power of the appliance. devices, eg a TV, to look at the energy transfers that occur Investigate how the amount of energy transferred to an electrical appliance depends on the amount of time that it is on for by connecting the appliance to a joulemeter. 6.2.4.2 Work done when charge flows. Calculating the amount of energy transferred. Equations for energy transfer should be known. Work is done when charge flows in a circuit. The amount of energy transferred by electrical work can be calculated using the equation: 1 Describe how work is done when a charge in a circuit. What are the charge carriers in an electric current? How does a moving charge do work? What can moving charge do? Describe, with examples, the relationship between the power ratings for domestic electrical appliances and the changes in
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