OCR A Level Physics

Revision Notes

1.3.9 Computer Modelling & Data Logger

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Computer Modelling & Data Logger

  • Computing modelling and using a data logger are essential in all scientific experiments for obtaining and analysing reliable results

Data Loggers

  • Data loggers are a tool that allows for the quick and efficient gathering of data
    • The information contained within a data logger can be inputted into a computer and formatted into a table
    • After this is done the computer is able to calculate the average and plot graphs using the data and calculate gradients which quicker and more accurately than humans

  • They are electronic devices that automatically monitor and record environmental parameters over time such as temperature, pressure, voltage or current
    • It contains multiple sensors to receive the information and a computer chip to store it

Datalogger, downloadable AS & A Level Physics revision notes

A data logger measuring and displaying temperature using a probe

  • The benefits of using data loggers and ICT (information and communication technology) include:
    • Readings are taken with higher degrees of accuracy
    • Reduction of human error (eg. human reaction times, subjectiveness)
    • Readings can be taken over a long period of time eg. hourly readings of temperature over many days
    • Readings can be taken in a very short period of time, which would be too quick for humans to see a difference
    • Reduction in safety risks with extreme conditions such as measuring the temperature of boiling water

Computer Modelling

  • Computer modelling is commonly done in conjunction with devices such as a data logger
    • Modelling is about processing the data collected from a physics experiment into software or a spreadsheet

  • Graphs and charts can be generated from a table of values
    • These can then be exported to a scientific report

  • One of the benefits of these computer programs is that time can be sped up to predict the future outcome of an experiment

Computing Modelling, downloadable AS & A Level Physics revision notes

Computer modelling uses a computer and sensors to analyse and display data

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