Measurement and Instrumentation A permanent magnet moving coil ammeter is connected in 50 Hz a. c. Circuit in which 5A current is flowing. The meter will read 2.5 A None of the listed here 0 A 5 A 2.5 A None of the listed here 0 A 5 A ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Some wire- wound resistors have bifilar winding. This type of winding is used to Reduce the tolerance Increase the thermal stability Double the power rating of the resistor Reduce the inductance of winding Reduce the tolerance Increase the thermal stability Double the power rating of the resistor Reduce the inductance of winding ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Which of following is not correct? A shunt should have a very low resistance. Voltmeter should have very high resistance. An ammeter should have a very low resitance. An electronic voltmeter draw appreciable current from the source. A shunt should have a very low resistance. Voltmeter should have very high resistance. An ammeter should have a very low resitance. An electronic voltmeter draw appreciable current from the source. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A 0 - 250V voltmeter has a guaranteed accuracy of 2% of full scale reading. What is the percentage of error if it measures 150V? 3.33% 1% 2% 5% 3.33% 1% 2% 5% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A resistance is measured by the voltmeter-ammeter method employing dc excitation and a voltmeter of very high resistance connected directly across the unknown resistance. If the voltmeter and ammeter reading are subject to maximum possible errors of ± 2.4 % and ± 1.0 % respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is nearly ± 3.4% ± 1% ± 1.4% ± 2.4% ± 3.4% ± 1% ± 1.4% ± 2.4% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Which of the following are integrating instruments? Wattmeters Ampere hour and watt hour meters Voltmeters Ammeters Wattmeters Ampere hour and watt hour meters Voltmeters Ammeters ANSWER DOWNLOAD EXAMIANS APP
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