Lesson: Electrical Resistance Science • Third Year of Preparatory School

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In this lesson, we will learn what electrical resistance is and how it affects the flow of charge within a circuit.

Students will be able to

understand that electrical resistance is the opposition to the flow of charges within a conductor,
understand that very large currents can cause wires to heat up,
know that resistance can be measured in ohms,
know that resistance can be measured using an ohmmeter,
understand that if there is a potential difference across a component of one volt and the current through it has a value of one amp, then the resistance of the component is one ohm,
identify the circuit symbol for a resistor,
identify the circuit symbol for a variable resistor,
understand that the resistance of a wire increases if the length of the wire increases.