A 0-voltmeter has a guaranteed accuracy ofof full scale reading. The voltage measured by this instrument isV. Calculate the limiting error in percentage.
a) 4%
b) 2%
c) 2.5%
d) 1%
Q.2.
A resistor ofkΩ with the tolerance ofis connected in parallel with 5 kΩ resistors oftolerance. What is the tolerance limit for a parallel network?
a) 9%
b) 12.4%
c) 8.33%
d) 7.87%
Q.3.
The current flowing in a resistor ofis measured to beA. But it was discovered that ammeter reading was low byand resistance was marked high by 0.5%. Find true power as a percentage of the original power.
a) 95%
b) 101.5%
c) 100.1%
d) 102.4%
Q.4.
A resistor ofkΩ with the tolerance ofis connected in series with 5 kΩ resistors oftolerance. What is the tolerance limit for a series network?
a) 9%
b) 12.04%
c) 8.67%
d) 6.67%
Q.5.
Two resistances±and±are connected in series. If the error is specified as standard deviations, the resultant error will be _________
a) ±10 Ω
b) ±10.6 Ω
c) ±15.8 Ω
d) ±20 Ω
Q.6.
Resistances R1 and R2 have respectively, nominal values ofandand limiting error of ±and ± 10%. The percentage limiting error for the series combination of R1 and R2 is?
a) 6.67%
b) 5.5%
c) 7.77%
d) 2.8%
Q.7.
A voltmeter has a sensitivity ofΩ/V readsV on itsV scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter readsmA. The apparent resistance of the unknown resistor will be?
a) 20 kΩ
b) 21.43 kΩ
c) 18.57 kΩ
d) 22.36 kΩ
Q.8.
A voltmeter has a sensitivity ofΩ/V readsV on itsV scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter readsmA. The actual resistance of the unknown resistor will be?
a) 20 kΩ
b) 18.57 kΩ
c) 21.43 kΩ
d) 22.76 kΩ
Q.9.
A voltmeter has a sensitivity ofΩ/V readsV on itsV scale. When connected across an unknown resistor in series with a millimeter. When the milliammeter readsmA. The error due to the loading effect of the voltmeter is ________
a) 3.33%
b) 6.67%
c) 13.34%
d) 13.67%
Q.10.
AA,Hz current transformer has a bar primary. The secondary burden is a pure resistance of 1 Ω and it draws a current of 5 A. If the magnetic core requiresAmpere-turn for magnetization, the percentage ratio error is __________
a) 10.56%
b) -10.56%
c) 11.80%
d) -11.80%
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