Measurement and Instrumentation A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ? ± 0.054 ± 0.056 ± 0.065 ± 0.045 ± 0.054 ± 0.056 ± 0.065 ± 0.045 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A mulliammeter can be used as Voltmeter and ammeter Ohmmeter Frequency meter Wattmeter Voltmeter and ammeter Ohmmeter Frequency meter Wattmeter ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be 248 V. 252 V. 250 V. 260 V. 248 V. 252 V. 250 V. 260 V. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying power (the ratio of measured current to galvanometer current) of 100 Ω shunt with this galvanometer is 110. 10. 11. 100. 110. 10. 11. 100. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is 120 Ohm. 0.0012 Ohm. 240 Ohm. 0.0024 Ohm. 120 Ohm. 0.0012 Ohm. 240 Ohm. 0.0024 Ohm. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Kelvin’s double bridge is used to measure low resistance because resistance variation due to temperature. it has high sensitivity. effect of contact and lead resistance is eliminated. there is no thermo electric emf. resistance variation due to temperature. it has high sensitivity. effect of contact and lead resistance is eliminated. there is no thermo electric emf. ANSWER DOWNLOAD EXAMIANS APP
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