6.

b. Explain the principle and working of a LVDT. 5

a. Find the amplitude of recorded motion for a seismic instrument of mass 100g, 6
stiffness 1 N/mm and damping ratio 0.4 if the motion to be measured is 5 sin200t (mm).
Also find the maximum frequency for which the instrument can be used as an
accelerometer if the error is not to exceed 10%.

b. Explain the sensitivity Of a potentiometer circuit. 3

PART C
a. Discuss the calibration of photo elastic materials 6
b. Discuss the principle and working of arebound hammer. 6

a. Discuss the effect of stressed model ina circular polariscope. 12

a. Explain a computerized data acquisition system. 6

b. Explain the ultrasonic pulse velocity test including its applications. 6