Episode 10 — Electricity and Magnetism - Electric Circuits

Work,Power and Cost of Electricity Examples

Learners will be able to:

• Calculate the current flowing through a resistor given its power rating and potential difference. • Determine the total resistance of an external circuit in a parallel configuration. • Calculate the internal resistance of a battery using the EMF, internal potential difference, and total current. • Solve a simultaneous equation to find the time at which one energy-efficient light bulb becomes cheaper than another. • Compare the cost-effectiveness of different types of light bulbs over time.