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Lesson Plan: Resistance and Resistivity of Conductors Physics • Third Year of Secondary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to relate the dimensions of and the motion of free electrons through an object to its resistance.
Objectives
Students will be able to
- use the formula to relate the resistivity, resistance, and dimensions of a resistor,
- diagrammatically represent, in terms of the motion of free electrons, the effects of varying the length, cross-sectional area, and resistivity of a resistor on its resistance,
- diagrammatically represent, in terms of the motion of free electrons, the effects of varying the temperature of resistors,
- use the formula to relate the current in a resistor to the drift speed of free electrons in the resistor.
Prerequisites
Students should already be familiar with
- ,
- ,
- ,
- ,
- effects of temperature on resistors,
- thermistors.
Exclusions
Students will not cover
- current density,
- impedance.
