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Download Exercise Fundamental electrical measurements
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Transcript
Exercise 100B Fundamental electrical measurements Instruction I. Laboratory apparatus list - Stabilized power supply - Multimeters (2x) - Electrical wires - Set of resistors II. The purpose of the exercise Getting Acquainted with the basic electrical tools (including the measurements methods, measurement errors and instrument inaccuracies) Determination of electric current passing through the resistor as the function of voltage Analysis of the obtained results and report writing training III. Measurements instruction a) Connect the resistor with the multimeter as below 1 b) Measure the resistance value of each resistors. c) Connect the setup according to the scheme d) Changing the voltage applied to resistor read the value of current flowing through the resistor IV. Analysis of the results - V. Estimate the uncertainty of resistance u(R) Plot a graph I=f(U), where I – current [A], U – voltage [V] Using a linear regression model estimate the resistance value and its uncertainty Compare this value with the value of resistance obtained in point III (a) The table example 2
