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The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VI is 20 V peak-to-peak is​
  • a)
    3.183 kΩ
  • b)
    3.133 kΩ
  • c)
    3.183 Ω
  • d)
    56.183 Ω
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The figure below shows a circuit for an AC voltmeter. It utilizes a mo...
Average value of input voltage= 20/π or 6.366 V.
Since there is diode half of the time there is no voltage across the voltmeter hence the average value of the input voltage is 10/π or 3.183V.
The total resistance required to generate 1mA current is 3.183 kΩ out of which 50Ω is provided by the moving coil. Therefore, a resistance of 3.133 kΩ is required.
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The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VIis 20 V peak-to-peak is​a)3.183 kΩb)3.133 kΩc)3.183 Ωd)56.183 ΩCorrect answer is option 'B'. Can you explain this answer?
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The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VIis 20 V peak-to-peak is​a)3.183 kΩb)3.133 kΩc)3.183 Ωd)56.183 ΩCorrect 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 The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VIis 20 V peak-to-peak is​a)3.183 kΩb)3.133 kΩc)3.183 Ωd)56.183 ΩCorrect 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 The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VIis 20 V peak-to-peak is​a)3.183 kΩb)3.133 kΩc)3.183 Ωd)56.183 ΩCorrect answer is option 'B'. Can you explain this answer?.
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