12 Questions
What is the main purpose of integrating instruments?
To measure the total amount of electrical energy supplied to a circuit
Which physical effect is NOT utilized in the operation of measuring instruments?
Piezoelectric Effect
What is the formula to calculate the relative (percentage) limiting error?
$rac{A_n - A_a}{A_n} imes 100$
Which type of error is caused by the observer's mistakes in reading or using the instrument?
Gross Error
What is the main way to avoid instrumental errors in measuring instruments?
All of the above
Which type of error is caused by the effects of the environment on the measuring instrument?
Environmental Error
What is the main classification of electrical measuring instruments discussed in the text?
Absolute and secondary
What is a key characteristic of absolute instruments?
They measure electrical quantities based on their physical constants.
Which statement about secondary instruments is true according to the text?
They must be pre-calibrated against an absolute instrument.
What is the purpose of indicating instruments?
To show the instantaneous value of an electrical quantity at the time of measurement.
How do recording instruments present the variations in the measured quantity?
By tracing a continuous path on a moving chart using an ink pen.
Which of the following is an example of an indicating instrument according to the text?
All of the above
Learn about the classification of electrical measuring instruments into absolute instruments and secondary instruments based on how they provide measurement values. Absolute instruments measure using physical constants with no need for previous calibration, while secondary instruments require comparison for measurement.
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