Measurement and Instrumentation A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads (2 + √3/2)V. 2 V. 0 V. 5 V. (2 + √3/2)V. 2 V. 0 V. 5 V. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read 20. 10. 20√3. 10√3. 20. 10. 20√3. 10√3. 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. inclined at 30o. perpendicular. parallel. inclined at 60o. inclined at 30o. perpendicular. parallel. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Kelvin’s double bridge is used to measure low resistance because effect of contact and lead resistance is eliminated. there is no thermo electric emf. it has high sensitivity. resistance variation due to temperature. effect of contact and lead resistance is eliminated. there is no thermo electric emf. it has high sensitivity. resistance variation due to temperature. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows an ellipse. a circle. sinisoidal. a straight line. an ellipse. a circle. sinisoidal. a straight line. ANSWER DOWNLOAD EXAMIANS APP
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