Measurement And Instrumentation - Study Mode
[#86] The error in measurement of a DC voltmeter with input signal: 1.5 V, voltage range: 2 V, accuracy: ± (25 ppm of reading + 5 ppm of range) is
Correct Answer
(C) ±47.5 µV
[#87] In wire-wound strain gauges, the change in resistance on application of strain is mainly due to
Correct Answer
(C) Change in both length and diameter of wire
[#88] Absolute encoders are normally used for:
Correct Answer
(A) One revolution
[#89] In a Q meter, distributed capacitance of coil is measured by changing the capacitance of the tuning capacitor. The values of tuning capacitor are C 1 and C 2 for resonant frequency f 1 and 2f 1 respectively. The value of distributed capacitance is:
Correct Answer
(C) $$frac{{{C_1} - 4{C_2}}}{3}$$
[#90] Three phase four wire energy meter is used to measure:
Correct Answer
(D) Three phase unbalanced energy