How can you find the thickness of a sheet of paper using a screw gauge?

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Solution

Aim: To measure the thickness of the sheet using a screw gauge.
Apparatus required: A screw gauge, sheet of paper, and a magnifying lens.
Procedure: Insert the sheet between the studs of the screw gauge to determine the thickness of the paper, Find the average thickness and determine the correct thickness by applying the zero error.

Formula used:
$P i t c h o f t h e s c r e w = \frac{D i s \tan c e m o v e d b y t h e s c r e w}{N o . o f f u l l r o t a t i o n s} L e a s t c o u n t : \frac{p i t c h}{N o . o f d i v i s i o n s o n t h e c i r c u l a r s c a l e}$
Result: The thickness of the paper can be calculated as:
$t = M + n \times L . C H e r e : t = t h i c k n e s s o f p a p e r (m m) M = L i n e a r s c a l e r e a d i n g (m m) n = c i r c u l a r s c a l e r e a d i n g (m m) L . C = l e a s t c o u n t (m m)$
By substituting the value of M, n, and L.C we can calculate the thickness of the paper.

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