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Two different a.c, voltmeters are used to measure the voltage across the 22 kΩ resister shown in figure. Meter A has a.c. sensitivity of 10 kΩ/V, a guaranteed accuracy of 98% at full scale, and is set on its 200V scale. Meter B has an a.c. sensitivity of 4kΩ/V. a guaranteed accuracy of 98.5% at full scale, and is set on its (0-100)V range. Which meter Provides more accurate results?
  • a)
    Meter A
  • b)
    Meter B
  • c)
    Both meters provide same results
  • d)
    None of these
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two different a.c, voltmeters are used to measure the voltage across t...
Sensitivity of meter A, SA = 10 kΩ/V
Full scale reading of meter A, VFSD(A) = 200 V
Internal resistance of meter A,
RV(A) = 10 kΩ/V × 200 V
= 2000 KΩ
Guaranteed accuracy of Meter A = 98% at FSD.
Error of meter 
Sensitivity of meter B, SB = 4KΩ/V
Full Scale reading of meter B, VFSD = 100V
Internal resistance of meter B,
RV(B) = 4 KΩ/V × 100 = 400 KΩ
Guaranteed accuracy of meter B = 98.5% at FSD
Error of meter 
True reading across 22 KΩ resister 
If we use meter A, then the reading will be the effective will be, The effective resistance across 22kΩ
= 22k ||2000k = 21.76 kΩ
Now the reading 
But the meter has an error of 4V
Hence the range of reading = [49.71, 57.71]
If we use meter B, then the reading will be
The effective resistance across 22kΩ,
= 22k||400k = 20.85kΩ
Now, the reading 
But the meter has an error of 1.5V
Hence, the range of reading = [50.75, 53.75]
By observing both the readings we can conclude that meter B provides accurate results.
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Two different a.c, voltmeters are used to measure the voltage across the 22 kΩ resister shown in figure. Meter A has a.c. sensitivity of 10 kΩ/V, a guaranteed accuracy of 98% at full scale, and is set on its 200V scale. Meter B has an a.c. sensitivity of 4kΩ/V. a guaranteed accuracy of 98.5% at full scale, and is set on its (0-100)V range. Which meter Provides more accurate results?a)Meter Ab)Meter Bc)Both meters provide same resultsd)None of theseCorrect answer is option 'B'. Can you explain this answer?
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Two different a.c, voltmeters are used to measure the voltage across the 22 kΩ resister shown in figure. Meter A has a.c. sensitivity of 10 kΩ/V, a guaranteed accuracy of 98% at full scale, and is set on its 200V scale. Meter B has an a.c. sensitivity of 4kΩ/V. a guaranteed accuracy of 98.5% at full scale, and is set on its (0-100)V range. Which meter Provides more accurate results?a)Meter Ab)Meter Bc)Both meters provide same resultsd)None of theseCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Two different a.c, voltmeters are used to measure the voltage across the 22 kΩ resister shown in figure. Meter A has a.c. sensitivity of 10 kΩ/V, a guaranteed accuracy of 98% at full scale, and is set on its 200V scale. Meter B has an a.c. sensitivity of 4kΩ/V. a guaranteed accuracy of 98.5% at full scale, and is set on its (0-100)V range. Which meter Provides more accurate results?a)Meter Ab)Meter Bc)Both meters provide same resultsd)None of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two different a.c, voltmeters are used to measure the voltage across the 22 kΩ resister shown in figure. Meter A has a.c. sensitivity of 10 kΩ/V, a guaranteed accuracy of 98% at full scale, and is set on its 200V scale. Meter B has an a.c. sensitivity of 4kΩ/V. a guaranteed accuracy of 98.5% at full scale, and is set on its (0-100)V range. Which meter Provides more accurate results?a)Meter Ab)Meter Bc)Both meters provide same resultsd)None of theseCorrect answer is option 'B'. Can you explain this answer?.
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