Question

Review Qns 2 - ME 344 Instrumentation &Measurements Question 1: A simple Wheatstone bridge has arms of R 1212, R2 1192, and R,-1212. What is the value of R4 for balance? If R4-122 and the bridge is driven with a source at 100 V, what is the open-circuit output voltage? (123.0 Ω, 100 V, 0.21 V) Question 2: A capacitive transducer uses two quartz diaphragms of area 600 mm2 separated by a distance of 4.0 mm. A pressure of 900 kN/m, which applied to the top diaphragm produces a deflection of 0.ómm.The capacitance is 400 pF when no pressure is -M applied to the diaphragms. i. Find the value of capacitance after the application of pressure. i. What is the deflection of the diaphragms if, after the pressure is applied, the capacitance becomes double the capacitance when no pressure is applied What is the corresponding pressure? /m2 (470.58 pF, 2.0 mm, 3000 kN/m) Question 3: Figure Q3 shows a capacitive-displacement sensor designed to monitor small changes in work-piece position. The two metal cylinders are separated by a plastic sheath/bearing of thickness 1 mm and dielectric constant at 1 kHz of 2.5. If the radius is 2.5 cm, find the sensitivity in pF/m as the upper cylinder slides in and out of the lower cylinder. What is the range of capacity if h varies from 1.0 to 2.0 cm? Displacement Figure Q3 Question 4: The basic meter of Figure Q4 is designed so that B 1 Wb/m2 L=0.1 m K 1 N/m a) What deflection r results when a direct current of 4.0 A flows through the meter? b) Find an expression for x(t) if i(t) 2 cos(t) A. (0.4 m, 0.2 cos(t)

Answers for q 2,3 and 4 asap please !?

Answer 1

2. 34mm Crがト CFrmal 2.4mm) Cfrmal 800PT 2mm detl Press applie