Two resistors share a supply voltage but give different currents. What do the readings tell us? Calculate resistance in ohms and explain how resistance affects current at a fixed potential difference.

Pupils try “Compare two fixed resistors”. Includes the editable PowerPoint, a 50-minute lesson plan and a printable pupil sheet with equipment, instructions, example evidence and worked teacher answers.

KS3 physics for ages 11–14. Part of the electric charge and circuits sequence.

The printable Teach me, tell me starter includes 19 circuit vocabulary cards with partner questions and answers.

The download also includes 2 independently written practice sheets with teacher answers. The activities are Changing voltage at fixed resistance and Resistance along a wire.