A) Zero
B) Equal to 76 cm
C) More than 76 cm
D) Less than 76 cm
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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