explain how the resistance of a filament lamp changes as the potential difference across it increases
as the potential difference increases, the current increases (ohm's law). this causes the temperature of the filament to increase, causing the resistance to increase.
SQ
Related Physics GCSE answers
All answers ▸Using the kinetic molecular theory,explain why air pressure inside a syringe increases if the volume decreases from 15.0 cm
What is teminal velocity?
An electric Iron rated at 2600 W contains a steel plate, heated to a working temperature of 215°C. Room temp=18°C. Deduce whether the plate could reach its working temperature in less than 1 minute. Mass (steel plate)=890g & C (steel)=450J/kg/K
Simon's car has run out of fuel. He must push his car 5 metres to the petrol pump, using a force of 200N. How much work does Simon do?