A student is investigating the variation of resistance and temperature in a thermistor. The diagram shows part of the circuit the student intends to use. Complete the circuit diagram to show how the student should connect the apparatus, including a voltmeter and an ammeter.

A student investigates the resistance of a lamp. The student uses a circuit that contains an ammeter, a battery, a lamp and a voltmeter to determine the resistance of the lamp. Draw a circuit diagram to show how he should connect the apparatus.

Question 5c The manufacturer's guide states that the thermistor has a resistance of 12 kΩ at room temperature. The student wants to confirm the accuracy of this value before starting the investigation. At room temperature, the voltmeter shows a reading of 8 V. Determine if this reading is consistent with the manufacturer's value of resistance.

A battery of negligible internal resistance is connected in series with a thermistor and a fixedresistor of resistance 12.0 kΩ, as shown.12.0 k VoutThe table shows the resistance of the thermistor at two different temperatures.temperature/ °Cresistance ofthermistor / kΩ20.0 12.050.0 5.00The potential difference Vout across the fixed resistor is 4.50 V when the thermistor is at atemperature of 20.0 °C.What is Vout when the thermistor is at a temperature of 50.0 °C?A 2.65 V B 3.18 V C 6.35 V D 10.8 V

Give one common application of the thermistor.*

Describe an investigation a student could do to find how the resistance of a metalsample varies with temperature. The student uses the equipment shown.Include in your answer:• how the student should use the equipment• the measurements the student should make• how the student should use these measurements to determine the resistance• how to make sure the results are valid.