• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

How the resistance of a thermister is affected by different temperatures.

Extracts from this document...

Introduction

How the resistance of a thermister is affected by different temperatures Aim To investigate whether different temperatures effect the resistance of a themister. Prediction I predict that when the temperature of water is higher the voltage becomes larger but the milliamps become lower as temperature increases I believe this because thermisters are semi conductors this means the resistance of the material gets less as it gets hotter. Because a temperature is usually made from a material which is a good electrical conductor when it is hot. ...read more.

Middle

I will do this 6 times to do 6 different temperatures 80c, 70c, 60c, 50c, 40c and 30 I will take my readings from the ammeter to give me the current readings and from the volt meter to get the voltage. I will do this 3 times for each temperature so I can work out an average to give a more accurate result. I will show my results in a table and look for a pattern. Control Variables Things that need to be taken into consideration are; Results TEMP CURRENT (A) ...read more.

Conclusion

25.6 / 25.7 25.9 2.5 / 2.7 / 2.8 2.6 Conclusion From this experiment I found that the resistance decreases as the temperature increases as I predicted. From my graph I can see that the thermistors resistance drops a lot from room temperature and then steadily declines as the line of best fit shows that there are no anomalous results apart from the first one at 30c. this is probably because it took time for the thermister to respond to the heat. I have worked out that the following equation is how to work out the resistance. Resistance = voltage - Current V -- = R I ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. I am going to investigate what the resistivity is of a pencil lead. ...

    This means that when the voltage is doubled so is the current. For example: 0.4V=0.470A and 0.8V=0.917A. This is almost exact but other factors may have influenced the result such as human error etc. The typical resistivity of many semi conductors is 102 so my result is quite far away

  2. Characteristics of Ohmic and Non Ohmic Conductors.

    Theses conditions we will see now. The tables and the graphs shown will be filled up after the experiment has been carried out. We will have to carry out the experiment for different materials to note down the readings on the voltmeter and ammeter.

  1. My aim is to investigate at which temperatures will give me which resistance and ...

    Equipment In this experiment I used the following: 1x kettle, 1x thermistor, 1x multimeter, 2x crocodile clips, some ice cubes, 1x large beaker and 1x thermometer. Method Step1: - Set up the experiment as shown in the diagram above. Step 2: - To get the correct temperature of the water

  2. Characteristics of Ohmic and non-Ohmic Conductors.

    As more electrons flow, current increases. Current (I) Voltage (V) As voltage increases, the temperature increases, the resistance decreases, and hence the graph gets steeper. Resistance (?) Temperature (oC) The resistance of a semiconductor decreases as the temperature increases. I will now experiment to see if my predictions based on my knowledge of the different kinds of conductors are correct.

  1. Investigating how temperature affects the resistance in a wire

    on the resistance) -3 DC 3 Volt batteries (used to provide electricity (volts and amps) into the circuit) -Selotape (used to stick the two wooden splints with the steel wrapped around them together) -One 250ml-measuring cylinder (used to contain the water used for the water bath and the steel wrapped around the wooden splint)

  2. The Purpose of my sensing circuit is to regulate the temperature in a Steam ...

    thermistor, a multimeter and an electric kettle (Circuit shown on next page) Note: The thermistor is represented by the symbol below in a circuit Determining the value of the fixed resistor The value of the fixed resistor in my potential divider has to be one that gives a the largest

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work