Resistance -Bumper lesson pack with practicals

Series of lessons designed to build on knowledge of current and voltage.

Introducing resistance; Ohm’s Law; rules regarding length, cross sectional area, material and temperature; resistivity; current-voltage graphs of a wire, bulb, thermistor and diode; practical used for investigating the resistance of different components - includes questions for students to practice.

Ideal for AQA GCSE (9-1) P2, Cambridge iGCSE P8 and more

Lesson 1/3
Developing: State that resistance = p.d. / current and understand qualitatively how changes in p.d. or resistance affect current.

Securing: Recall the four factors that affect the resistance of a conductor.

Exceeding: Draw and interpret circuit diagrams containing multiple types of resistance component.

Lesson 2/3
Developing: Recall and use the equation R = V / I

Securing: Sketch a current-voltage graph for a metal conductor and a filament lamp and describe how current varies with p.d. for a metal conductor.

Exceeding: Interpret the current-voltage graphs and explain the differences between the two types of conductor.

Lesson 3/3
Developing: Recall that as a wire increases in length, so too does its resistance.

Securing: Describe the qualitative relationship between the length and resistance of a wire and the relationship between cross-sectional area and resistance.

Exceeding: Apply the proportionality between resistance and length, and the inverse proportionality between resistance and cross-sectional area of a wire to quantitative problems.