The output of LVDT with input mechanical motion of 10 Hz and excitation frequency of 400 Hz will contain frequencies:
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- 10 Hz and 400 Hz
- 400 Hz only
- 10 Hz only
- 390 Hz and 410 Hz
The Correct Option is D
Solution and Explanation
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In the force transducer shown in Figure (a), four identical strain gauges S1, S2, S3, and S4 are mounted on a cantilever at equal distance from its base. S1 and S2 are mounted on the top surface and S3 and S4 are mounted on the bottom surface, as shown in the Figure (a). These strain gauges are to be connected to form a Wheatstone bridge consisting of four arms A, B, C, and D, as shown in the Figure (b). From the following options, the correct order to maximize the measurement sensitivity is
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The primary coil of a linear variable differential transformer (LVDT) is supplied with AC voltage as shown in the figure. The secondary coils are connected in series opposition and the output is measured using a true RMS voltmeter. The displacement \(x\) of the core is indicated in mm on a linear scale. At the null position \(x = 0\), the voltmeter reads 0 V. If the voltmeter reads 0.2 V for a displacement of \(x = +2\) mm, then for a displacement of \(x = -3\) mm, the voltmeter reading, in V, is:
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Match the device with its working principle:
List-1 List-2 a. Bourdon gauge V. Deformation of element b. Pirani gauge I. Thermal conductivity c. Semiconductor strain gauge III. Piezo resistive effect d. Bi-metallic strip II. Thermal coefficient of expansion - TS PGECET - 2024
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Match the instruments with the parameters they measure:
List-1 Instrument List-2 (Parameter) A Autocollimeter \( \text{Angular error} \) B Hygrometer \( \text{Humidity} \) C Nephelometer \( \text{Density} \) D Mass spectrometer \( \text{Molecular weight} \) - TS PGECET - 2024
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- Gas chromatography is used for
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