A Level Physics Practice Exam

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Study for the A Level Physics Exam. Our quiz features flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly!

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How should a thermistor be set up in a circuit to measure temperature?

In series with a battery
In parallel with a voltmeter
In a circuit with an ammeter and voltmeter
Isolated from other components

The correct answer is: In a circuit with an ammeter and voltmeter

To effectively measure temperature using a thermistor in a circuit, it is essential to incorporate both a voltmeter and an ammeter. The thermistor is a type of resistor whose resistance changes significantly with temperature variations. By including a voltmeter, one can measure the voltage across the thermistor, which allows for the determination of resistance using Ohm's law, as the relationship between voltage, current, and resistance is crucial in analyzing its behavior. When the thermistor is connected in conjunction with an ammeter, it enables the measurement of the current flowing through the thermistor. With both the current and voltage known, one can calculate the thermistor's resistance and thus deduce the temperature based on the known characteristics of the thermistor. The arrangement enhances the accuracy of the temperature measurement and utilizes the thermistor's property effectively, making it essential to use both measurement devices in the circuit.