Question

A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

• A. 76 cm
• B. < 76 cm
• C. > 76 cm
• D. zero

Answer 1

The correct option is C

> 76 cm

If barometer reads 76 cm under accelerating condition then surely it would read greater than 76 cm when the lift is not accelerating,which shows that the air pressure is definitely more than 76 cm {i.e. 1 atm} inside the lift