Measurement and Instrumentation The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is 4 mA. 2 mA. 3 mA. 1 mA. 4 mA. 2 mA. 3 mA. 1 mA. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A permanent magnet moving coil ammeter has a coil resistance of 99ohm and Full Scale DeflectionFSD. current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is 0.023mA 0.05mA 0.007mA 0.1mA 0.023mA 0.05mA 0.007mA 0.1mA ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are inclined at 60o. parallel. perpendicular. inclined at 30o. inclined at 60o. parallel. perpendicular. inclined at 30o. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation For the AC bridge circuit shown in figure at balance the value of Rd will be (Rc/Ra).Rb. (Rc/Rb).Ra. (Rb/Rc).Ra. (Ra/Rc).Rb. (Rc/Ra).Rb. (Rc/Rb).Ra. (Rb/Rc).Ra. (Ra/Rc).Rb. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation No eddy current and hysteresis losses occur in PMMC instruments Moving iron instruments Electrostatic instruments Electrodynamo meter instruments PMMC instruments Moving iron instruments Electrostatic instruments Electrodynamo meter instruments 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% ± 2.4% ± 1.4% ± 3.4% ± 1% ± 2.4% ± 1.4% ANSWER DOWNLOAD EXAMIANS APP
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