- 1 A An Unknown Voltage Is Measured By A 2 Dmm With Accuracy Of 0 4 Reading 1 Digit And A Reading Of 76v Is Obt 1 (59.52 KiB) Viewed 56 times
1. (a) An unknown voltage is measured by a 2½ DMM with accuracy of +(0.4% reading + 1 digit) and a reading of 76V is obt
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1. (a) An unknown voltage is measured by a 2½ DMM with accuracy of +(0.4% reading + 1 digit) and a reading of 76V is obt
1. (a) An unknown voltage is measured by a 2½ DMM with accuracy of +(0.4% reading + 1 digit) and a reading of 76V is obtained. (i) What is the maximum voltage the meter can display? (ii) Calculate the percentage error of the measurement. (2%) (4%) (b) It is required to convert a moving coil micro-ammeter into a voltmeter of full scale 50V. The micro-ammeter has a full scale of 100µA and an internal resistance of 5000. Describe briefly with sketch what arrangement should be made for the conversion. (10%)