Calculate the limiting error of an ammeter of range 25 A given also th...
Given that, GAE = 1% of full scale reading
Full scale reading = 25 A
Error value = 0.01 × 25 = 0.25 A
View all questions of this testCalculate the limiting error of an ammeter of range 25 A given also th...
Given data:
Range of ammeter = 25 A
Guaranteed accuracy = 1% of full-scale reading
Current measured = 5 A
Limiting error of ammeter:
The limiting error is the maximum allowable error in the reading of an instrument. It is given by the formula:
Limiting error = (Range × Accuracy)/100
Substituting the given values, we get:
Limiting error = (25 × 1)/100 = 0.25 A
Therefore, the maximum allowable error in the reading of the ammeter is 0.25 A.
Percent error:
The percent error is the ratio of the limiting error to the measured value, expressed as a percentage. It is given by the formula:
Percent error = (Limiting error/Measured value) × 100
Substituting the given values, we get:
Percent error = (0.25/5) × 100 = 5%
Therefore, the percent error in the reading of the ammeter is 5%.
Hence, the correct option is D.