LVDT is Normally Operated in Differential Mode - Positive Temperature Coefficients - Differentiate Between Negative and Positive Strains - Engineering Assignment Help

Assignment Task:

Q1.
i) Why LVDT is normally operated in differential mode? Explain. 
ii) Show that for the LVDT circuit shown in   Fig. 1, VOUT = 0V. Assume that the core is at the center

Q2.                                                                                                                                                                                      
i) State two applications of Capacitive Transducer. 
ii) Prove that for a capacitive transducer  
  δC/C =  2δx/l      

Q3.
i) In Fig. 2, identify the materials with Positive Temperature Coefficients (PTCs)  
ii) Determine the output voltage VOUT for the bridge circuit shown in   Fig. 3.  Assume that R1=R2=R3=R4=R. 

Q4.
i) Differentiate between negative and positive strains. 
ii)  Two strain gauges (RT1 & RT2) find their way in the opposite arms of the bridge circuit shown in Fig. 4.  The other two resistors in the bridge have R = 350?.  Determine the voltage difference VLVR, when un-strained resistance of RT1 =RT2=500?. 
 
                

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