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

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one year ago

Vikas TU
12141 Points
```							Hiii We know that h = P/row*gso h is inversly proportional to g so, The reading will be less than 76cm.Hope this helps.
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one year ago
Arun
24738 Points
```							The pressure of the atmosphere remains the same in both the conditions =ρg*(0.76). But in the upward accelerating elevator the pressure of the mercury column =ρ(g+a)h, since these two are equal so h = (0.76){g/(g+a)}; clearly h
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one year ago
aswanth nayak
100 Points
```							dear student, under normal conditions when the elevator is accelerating upwards the reading in the barometer will be less than 76cm (air pressure is same as external) but as acc. to question the pressure is 76 cm means that the air is applying more pressure to lift the liquid to a height of 76cm. Hope it helps youRegards
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one year ago
aswanth nayak
100 Points
```							The pressure of the atmosphere remains the same in both the conditions =ρg*(0.76). But in the upward accelerating elevator the pressure of the mercury column =ρ(g+a)h, since these two are equal so h = (0.76){g/(g+a)}
```
one year ago
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Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions