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 ▸What is cosmic microwave background, and where does it come from?
According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?
In 5V circuit has two 2 Ohm resistors in parallel, what is the current passing through each resistor?
What are the differences between sound waves and electromagnetic waves?