appliance up to a joulemeter. 4.7.2.8 Work is done when charge Describe how work is 1 Discussion questions: cont. flows in a circuit. done when a charge What are the charge flows in a circuit. The amount of energy carriers in an electric transferred can be calculated Describe, with current? using the equations: examples, the How does a moving charge relationship between do work? energy transferred = × the power ratings for What can moving charge time domestic electrical do? [E = P t] appliances and the changes in stored energy transferred = charge energy when they are flow × potential difference in use. [E = Q V] Calculate the energy energy transferred, E, in transferred by an joules, J electrical appliance and rearrange the power, P, in watts, W equation to find the time, t, in seconds, s two values. charge flow, Q, in coulombs, Use the equation C including rearranging
appliance up to a joulemeter. 4.7.2.8 cont. Work is done when charge flows in a circuit. The amount of energy transferred can be calculated using the equations: energy transferred = × time [E = P t] energy transferred = charge flow × potential difference [E = Q V] energy transferred, E, in joules, J power, P, in watts, W time, t, in seconds, s charge flow, Q, in coulombs, C Describe how work is done when a charge flows in a circuit. Describe, with examples, the relationship between the power ratings for domestic electrical appliances and the changes in stored energy when they are in use. Calculate the energy transferred by an electrical appliance and rearrange the equation to find the two values. Use the equation including rearranging 1 Discussion questions: What are the charge carriers in an electric current? How does a moving charge do work? What can moving charge do?
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