Properties Of Solids And Liquids Question 292

Question: A barometer kept in a stationary elevator reads 76 cm. If the elevator starts accelerating up the reading will be

Options:

A)Zero

B)Equal to 76 cm

C)More than 76 cm

D)Less than 76 cm

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Answer:

Correct Answer: D

Solution:

$ h=\frac{P}{\rho g} $ $ h\propto \frac{1}{g} $ .

If lift moves upward with some acceleration then effective g increases.

So the value of h decreases i.e. reading will be less than 76 cm.



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