IB Physics SL B.5.15 Variable resistance
IB Physics SL B.5.15 Variable resistance
Predict how variable resistance changes circuit readings by following slider position, component response, and the extra data it enables in experiments.
How this is tested
- use a potential-divider circuit diagram to state how the ammeter reading changes as the slider moves
- predict from the circuit diagram that removing a parallel branch changes current and so a variable resistance
- justify a variable resistor as a better method because multiple V-I data points give a gradient for r