Is this a valid circuit set-up to investigate how resistance in a thermistor is affected by a temperature and also what is the purpose of the external load resistance?(is the external load resistance necessary?)
Yeaah it's part of a six marker but would the circuit I drew up there work? Also could you perhaps explain why there would be an external resistor?
yeh it would work. the need for the other resistor is so that the voltage can differ as in series the voltages across each component must add up to the emf (assuming no internal resistance). if it wasn't there then i don't the the voltage would change? i think it acts as a voltage divider.