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 ▸State 2 factors that affect the centripetal force for a object having a circular path.
(IGCSE, Jan 2013, q8 adapted) The astronaut David Scott dropped a hammer and a feather from rest, at the same time and from the same height on the moon. The hammer and the feather landed at the same time. Why?
Explain the process of nuclear fusion in the Sun.
Describe the model now used for the structure of an atom. Refer to the constituent particles including their relative masses and charges.