6. Compare the circuit sensitivities of the bridges shown
in Fig. below. Also compute the

required voltage for Bridge 2. (9 marks)

4E
6४
BRIDGEBUDGE 2
1
PART C (2x12=24 marks)
7. a) Explain the process of calibration of photoelastic

materials. (6 marks)

b) Explain in detail, the ultrasonic pulse velocity method

for testing of concrete. (6 marks)
8. ൭) Discuss the working of cathode ray oscilloscope. (5 marks)
b) Discuss the method of separation of fringes by the shear
difference method. (7 marks)

9. Explain the optical effects observed in a circular
polariscope. (12 marks)