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An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?
- a)-1.51 %
- b)3.03 %
- c)1.51 %
- d)-3.03 %
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p....
Energy consumed by load =VIcosϕ×t×10−3KWhr
=220×20×0.8×3×10−3KWhr=10.56KWhr
The expected revolution for the measurement of true energy =10.56× meter constant
=10.56×250=2640rev
But meter makes the revolution =2600 rev.
So, the error =
= −1.51%
Most Upvoted Answer
An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p....
Given data:
Load current, I = 20 A
Supply voltage, V = 220 V
Power factor, PF = 0.8
Time, t = 3 hours
Meter constant, K = 250 rev/KWhr
Number of revolutions observed, NR = 2600
Calculation:
Real power consumed by the load, P = VIcos(θ) = 20 x 220 x 0.8 = 3520 W
Energy consumed by the load, E = Pt = 3520 x 3 = 10560 Wh = 10.56 KWh
Number of revolutions per unit of energy, K' = 1/K = 1/250 = 0.004 rev/Wh
Energy recorded by the meter, EM = NR x K' = 2600 x 0.004 = 10.4 KWh
Percentage error in the reading, % error = [(EM - E)/E] x 100 = [(10.4 - 10.56)/10.56] x 100 = -1.51%
Therefore, the error in the reading is -1.51%, which is option A.
Load current, I = 20 A
Supply voltage, V = 220 V
Power factor, PF = 0.8
Time, t = 3 hours
Meter constant, K = 250 rev/KWhr
Number of revolutions observed, NR = 2600
Calculation:
Real power consumed by the load, P = VIcos(θ) = 20 x 220 x 0.8 = 3520 W
Energy consumed by the load, E = Pt = 3520 x 3 = 10560 Wh = 10.56 KWh
Number of revolutions per unit of energy, K' = 1/K = 1/250 = 0.004 rev/Wh
Energy recorded by the meter, EM = NR x K' = 2600 x 0.004 = 10.4 KWh
Percentage error in the reading, % error = [(EM - E)/E] x 100 = [(10.4 - 10.56)/10.56] x 100 = -1.51%
Therefore, the error in the reading is -1.51%, which is option A.
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An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer?
Question Description
An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer?.
An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An energy meter is connected to a load drawing 20 A, 220 V and 0.8 p.f. for 3 hours. The meter was observed making 2600 revolution during this period. The meter having meter constant 250 rev/KWhr. Find the error in the reading?a)-1.51 %b)3.03 %c)1.51 %d)-3.03 %Correct answer is option 'A'. Can you explain this answer?.
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