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What are the demerits of the typical ultrasonic flaw detector?
Demerits of a typical ultrasonic flaw detector:
a. Both the sides of the specimen are needed for the study.
b. Both the sides of the wall to be studied require being parallel.
c. As two different probes are utilized for transmission and reception coupling loss is maximised.
d. Simply the presence of the defect is revealed. The depth of it is not made known.
Illustrate the principle of potentiometer. Define a mathematical experiment for the comparison of emf's of two cells. Define the principle and construction of potentiometer and
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Figure denotes a rod whose ends are in thermal contact with a hot reservoir at temperature T1 and a cold reservoir at temperature T2. The ends of the rod are covered with insulati
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What do we denote when we say that a capacitor has an amount of charge Q on it? Answer: If we obtain the expression the charge on the capacitor too accurately the value is
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