Q. 15.0( 4 Votes )
Explain a m
We can find the thickness of a hollow tea cup by using screw gauge. To find the thickness of the cup, follow given steps:
i) Determine the least count, pitch and the zero error of the screw gauge.
ii) Hold the cup between anvil and spindle.
iii) Rotate the head until the cup is held firmly but not tightly, with the help of the ratchat .
iv) ) Note the reading of the pitch scale crossed by the head scale (PSR) and the head scale division that coincides with the pitch scale axis (HSC).
v) The thickness of the cup is given by PSR + CHSR (Corrected HSR). Repeat the experiment for different positions of the coin.
vi) Note the readings in a table.
vii) The average of the last column readings gives the thickness of the cup.
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