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Calculate the limiting error of an ammeter of range 25 A given also that it has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A.
  • a)
    2%
  • b)
    2.5%
  • c)
    4%
  • d)
    5%
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
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
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Most Upvoted Answer
Calculate 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.
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Calculate the limiting error of an ammeter of range 25 A given also that it has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A.a)2%b)2.5%c)4%d)5%Correct answer is option 'D'. Can you explain this answer?
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