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 240 Ohm. 0.0024 Ohm. 120 Ohm. 0.0012 Ohm. 240 Ohm. 0.0024 Ohm. 120 Ohm. 0.0012 Ohm. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of Contact resistance. Thermoelectric emfs. All of above. Resistance of connecting leads. Contact resistance. Thermoelectric emfs. All of above. Resistance of connecting leads. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The given figure shows wein bridge connection for frequency measurement. C and R are variables and gang together. For balanced condition the expression for frequency is f = 1/2πCR when R1 = R2/2. R1 = R2. R1 = 2R2. R1 = 3R2. R1 = R2/2. R1 = R2. R1 = 2R2. R1 = 3R2. 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. (Ra/Rc).Rb. (Rb/Rc).Ra. (Rc/Rb).Ra. (Rc/Ra).Rb. (Ra/Rc).Rb. (Rb/Rc).Ra. (Rc/Rb).Ra. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is small. high. very high. ideally zero. small. high. very high. ideally zero. ANSWER DOWNLOAD EXAMIANS APP
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