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Q1: Let angular value of one graduation of a tube of length x be φ seconds and R be the radius of its internal curved surface, then

A

B

C

D .

ANS:A -

Arc = φ *R......... φ in rad.
φ rad = Arc/R.
φ = Arc/(R*rad) = x/(R*206265). x = Angular value of one graduation of tube of length.
φ = Second.
R = Radius.

D = 206265 sec.
(x/r)*d = (x/r)*206265.

φ = x/206265. Yeah,angle= (arc/radius) radians.
= (d/r) * 206265 sec.
= (206265d/r).
(1rad=206265sec).



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