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A uniform tube is shown in figure, Which...

A uniform tube is shown in figure, Which is open at one en and closed at the other . To enclose a column of air inside the tube, a pellet of mercury is introduced If the length of air column at `27^(@)C` is 18 cm, at what temperature its length will be 21.6? `

A

21.5 cm

B

21.6 cm

C

21.7 cm

D

21.8 cm

Text Solution

Verified by Experts

The correct Answer is:
B
The mercury pellet is free to slide. So pressure inside always remains equal to outside pressure ` (P_0 ) ` .
So. ` (V_1)/(T_1 ) = (V_2 )/(T_2) , (18)/(300) = (l_2)/(360) rArr l_2 = 18 xx (6 )/(5 ) = 21.6 cm `
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