The graph in Figure was obtained by measuring the resistance $R$ of a particular thermistor as its temperature changed.

Determine its resistance at: $20°C$

The graph in Figure was obtained by measuring the resistance R of a particular thermistor as its temperature e changed. Determine its resistance at: $45°C$.

The graph in Figure was obtained by measuring the resistance R of a particular thermistor as its temperature e changed Determine the temperature when its resistance is: $5000\Omega$.

The graph in Figure was obtained by measuring the resistance R of a particular thermistor as its temperature e changed. Determine the temperature when its resistance is:$2000\Omega$.

A student connects a circuit with an NTC thermistor, a filament lamp and a battery in series. The lamp glows dimly. The student warms the thermistor with a hair dryer. What change will the student notice in the brightness of the lamp? Explain your answer

The resistance of a metal wire changes with temperature. This means that a wire could be used to sense changes in temperature, in the same way that a thermistor is used 

 Suggest one advantage a thermistor has over a metal wire for this purpose.

The resistance of a metal wire changes with temperature. This means that a wire could be used to sense changes in temperature, in the same way that a thermistor is used.

Suggest one advantage a metal wire has over a thermistor.

Use the resistivity value quoted in given table. Calculate the lengths of 0.50mm diameter manganin wire needed to make resistance coils with resistances of: $1.0\Omega$ .

Use the resistivity value quoted in given table. To calculate the lengths of 0.50mm diameter manganin wire needed to make resistance coils with resistances$5.0\Omega$.