Physics

• Error is defined as the difference between the true value and the measured value and in most sources, it is used interchangeably with uncertainty.
• Random errors occur when repeated measurements produce randomly different results.
• Random error is a short-term variation of values around a mean value.
• Random error is caused by unknown and unpredictable changes in the environment.
• Examples of Random Errors include electrical noise in the circuit of an electrical instrument and irregular changes in the heat loss rate of a solar panel due to the changes in the wind.
• Resolution of the instrument is also an example of random error.
• Systematic Error is an error that remains constant or changes in a regular fashion even if measurements are repeated.
• Systematic Error causes the measured values to veer away from the accepted or predicted value.
• Sources of Systematic Error include faulty calibrations of instruments, poorly maintained instruments, and incorrect reading by the user.
• Error bars are graphical representations that indicate the range by which each point probably lies in the graph.
• Error is defined as the difference between the TRUE VALUE and the MEASURED VALUE.
• Random Errors is a short-term variation of values around a mean value and influences the accuracy of the result.
• Electrical noise in a circuit is an example of a Random error.
• Errors that remain constant or changes in a regular manner even if repeated measurements are conducted is called Systematic Error.
• Systematic Error occurs when a user reads an instrument at a different angle or line of sight.
• Mistakes are similar in nature to systematic errors and are also difficult to detect.
• Mistakes There are also no statistical techniques available to quantify it.
• The least count is the smallest division found in a measuring device.
• ERROR BARS is used to represent the range of uncertainty in the data points when plotted on a graph.
• TRUE, The use of calibrated instruments can reduce random errors.
• TRUE, Limited precision of an instrument can be a source of systematic error.
• TRUE, “Human error” or mistake is not a source of experimental error.
• FALSE, A meterstick with gradations in centimeters has a least count of 1 cm.
• TRUE, A larger error bar indicates large uncertainty.