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Two 100 V full scale PMMC type DC voltmeters having figure of Merits (FOM) of 10 kΩ/V ad 20 kΩ/V are connected in series. The series combination can be sued to measure a maximum DC voltage of:
- a)200 V
- b)100 V
- c)300 V
- d)150 V
Correct answer is option 'D'. Can you explain this answer?
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Two 100 V full scale PMMC type DC voltmeters having figure of Merits (...
Solution:
Now IFSD 1=0.1mA ,IFSD2=0.05mA
So,voltmeter 2 reads the full scales current allowed is 0.05mA and and voltmeter one reads half of its full scale value so the total reading is 150V.
Most Upvoted Answer
Two 100 V full scale PMMC type DC voltmeters having figure of Merits (...
Option D the FOM values are different for both the voltmaters the least voltage drop across the lower resistance voltmeter will be least.
from the FOM values it is clear that 20kOhm meter will read it's full scale (100V) reading first in the series combination. at the same time 10kOhm will read 50V. total voltage across the combination is 150V.
but we can increase voltage further still can measure voltage up to a point 10kOhm meter will read it's full deflection (100V). from the above example. the voltage indicated in by the 10KOhm Vm is 1/3 rd of appled voltage.
hence for a full scale deflection of 10kOhm meter the total voltage across the total combination will be 100*3= 300V
hence option D
from the FOM values it is clear that 20kOhm meter will read it's full scale (100V) reading first in the series combination. at the same time 10kOhm will read 50V. total voltage across the combination is 150V.
but we can increase voltage further still can measure voltage up to a point 10kOhm meter will read it's full deflection (100V). from the above example. the voltage indicated in by the 10KOhm Vm is 1/3 rd of appled voltage.
hence for a full scale deflection of 10kOhm meter the total voltage across the total combination will be 100*3= 300V
hence option D
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Two 100 V full scale PMMC type DC voltmeters having figure of Merits (...
The figure of merit of a PMMC type dc voltmeter is given by the formula:
Figure of merit (FOM) = Full scale voltage (V) / Full scale current (I)
Given:
Full scale voltage (V) = 100V
Figure of merit (FOM) = 10 k
We need to find the full scale current (I).
Rearranging the formula, we have:
FOM = V / I
10 k = 100V / I
10 k * I = 100V
I = 100V / 10 k
I = 0.01 mA
Therefore, the full scale current for the two 100V full scale PMMC type dc voltmeters is 0.01 mA.
Figure of merit (FOM) = Full scale voltage (V) / Full scale current (I)
Given:
Full scale voltage (V) = 100V
Figure of merit (FOM) = 10 k
We need to find the full scale current (I).
Rearranging the formula, we have:
FOM = V / I
10 k = 100V / I
10 k * I = 100V
I = 100V / 10 k
I = 0.01 mA
Therefore, the full scale current for the two 100V full scale PMMC type dc voltmeters is 0.01 mA.
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Two 100 V full scale PMMC type DC voltmeters having figure of Merits (FOM) of 10 kΩ/V ad 20 kΩ/V are connected in series. The series combination can be sued to measure a maximum DC voltage of:a)200 Vb)100 Vc)300 Vd)150 VCorrect answer is option 'D'. Can you explain this answer?
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Two 100 V full scale PMMC type DC voltmeters having figure of Merits (FOM) of 10 kΩ/V ad 20 kΩ/V are connected in series. The series combination can be sued to measure a maximum DC voltage of:a)200 Vb)100 Vc)300 Vd)150 VCorrect answer is option 'D'. 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 100 V full scale PMMC type DC voltmeters having figure of Merits (FOM) of 10 kΩ/V ad 20 kΩ/V are connected in series. The series combination can be sued to measure a maximum DC voltage of:a)200 Vb)100 Vc)300 Vd)150 VCorrect answer is option 'D'. 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 100 V full scale PMMC type DC voltmeters having figure of Merits (FOM) of 10 kΩ/V ad 20 kΩ/V are connected in series. The series combination can be sued to measure a maximum DC voltage of:a)200 Vb)100 Vc)300 Vd)150 VCorrect answer is option 'D'. Can you explain this answer?.
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