In a circuit with a thermistor and bulb, what happens to the brightness of the bulb as the temperature increases?
As the temperature increases, the resistance of the thermistor decreases. So the resistance of the whole circuit decreases. Using V=IR, the PD remains constant but resistance has decreased, so current must increase. Using V=IR in just the bulb, the resistance is unchanged, the current has increased so the PD increases. The bulb gets brighter
Related Physics A Level answers
All answers ▸Describe an experiment, using a pendulum, which can be conducted to investigate g, acceleration due to gravity.
How and why does a geostationary satellite stay above the same point on the Earths surface?
What are the different classifications of sub-atomic particles?
If two cars are moving, labelled car A and car B. Car A moves at 15 m/s and B at 10 m/s but car B also accelerated at 2 m/s/s. If the two both travel for ten seconds, which car will travel further?