An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is2%2.5%4%5%3%
Question
An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is2%2.5%4%5%3%
Solution
The limiting error is calculated based on the full scale reading, not the actual measurement. The full scale reading in this case is 25 A. The guaranteed accuracy is 1% of the full scale reading, which is 0.01 * 25 = 0.25 A. Therefore, when measuring a current of 5 A, the limiting error is 0.25 A / 5 A = 0.05 or 5%. Therefore, the answer is "5%".
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