Electrical Measurements Exam Online Exam Quiz
Electrical Measurements Exam GK Quiz. Question and Answers related to Electrical Measurements Exam. MCQ (Multiple Choice Questions with answers about Electrical Measurements Exam
Two resistances 100 ± 5? and 150 ± 15? are connected in series. If the error is specified as standard deviations, the resultant error will be _________
Options
A : ±10 ?
B : ±10.6 ?
C : ±15.8 ?
D : ±20 ?
A 500 A, 50 Hz current transformer has a bar primary. The secondary burden is a pure resistance of 1 ? and it draws a current of 5 A. If the magnetic core requires 250 Ampere-turn for magnetization, the percentage ratio error is __________
Options
A : 10.56%
B : -10.56%
C : 11.80%
D : -11.80%
A voltmeter has a sensitivity of 1000 ?/V reads 200 V on its 300 V scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter reads 10 mA. The actual resistance of the unknown resistor will be?
Options
A : 20 k?
B : 18.57 k?
C : 21.43 k?
D : 22.76 k?
A voltmeter has a sensitivity of 1000 ?/V reads 200 V on its 300 V scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter reads 10 mA. The apparent resistance of the unknown resistor will be?
Options
A : 20 k?
B : 21.43 k?
C : 18.57 k?
D : 22.36 k?
A voltmeter has a sensitivity of 1000 ?/V reads 200 V on its 300 V scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter reads 10 mA. The error due to the loading effect of the voltmeter is ________
Options
A : 3.33%
B : 6.67%
C : 13.34%
D : 13.67%
A 0-400V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 250 V. Calculate the limiting error in percentage.
Options
A : 4%
B : 2%
C : 2.5%
D : 1%
Resistances R1 and R2 have respectively, nominal values of 10? and 5? and limiting error of ± 5% and ± 10%. The percentage limiting error for the series combination of R1 and R2 is?
Options
A : 6.67%
B : 5.5%
C : 7.77%
D : 2.8%
A resistor of 10 k? with the tolerance of 5% is connected in series with 5 k? resistors of 10% tolerance. What is the tolerance limit for a series network?
Options
A : 9%
B : 12.04%
C : 8.67%
D : 6.67%
A resistor of 10 k? with the tolerance of 5% is connected in parallel with 5 k? resistors of 10% tolerance. What is the tolerance limit for a parallel network?
Options
A : 9%
B : 12.4%
C : 8.33%
D : 7.87%
The current flowing in a resistor of 1? is measured to be 25 A. But it was discovered that ammeter reading was low by 1% and resistance was marked high by 0.5%. Find true power as a percentage of the original power.
Options
A : 95%
B : 101.5%
C : 100.1%
D : 102.4%
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