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A mercury barometer reads 75cm in vertic...

A mercury barometer reads `75cm` in vertical position . If the tube is inclined by `60^(@)` to the vertical, the length of the mercury in the tube will be

A

37.5 cm

B

75cm

C

112.5cm

D

150cm

Text Solution

Verified by Experts

The correct Answer is:
D
`cos 60^(@) = h/l`

or, `l = (h)/(cos 60^(@)) = (75)/(1//2) cm = 150cm`.
The vertical height of mercury level in a barometer does not change.
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Knowledge Check

  • Water rises to a height of 5 cm when a narrow glass tube is dipped vertically in it . If the tube is inclined at 60^(@) to the vertical , then the rise of water in the capillary tube will be

    A
    5 cm
    B
    10 cm
    C
    `7.5` cm
    D
    `2.5` cm

  • The meniscus of mercury in the capillary tube is

    A
    Convex
    B
    Concave
    C
    Plane
    D
    Uncertain

  • A capillary tube when immersed vertically in a liquid records a rise of 6 cm . If the tube is immersed inclined 30^@ with the vertical , then length of liquid column along the tube will be

    A
    `2sqrt(3) cm `
    B
    `4sqrt(3)cm`
    C
    `4/(sqrt(3))cm`
    D
    12 cm
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