Figure shows an L- shaped thin tube filled with a liquid to a height H . What should be the horizontal acceleration a of the tube, so that the pressure at point A becomes atmospheric ?

Q: Figure shows an L- shaped thin tube filled with a liquid to a height H . What should be the horizontal acceleration a of the tube, so that the pressure at point A becomes atmospheric ?

(a) $\displaystyle \sqrt{2} \frac{g L}{H}$

(b) $\displaystyle \frac{g L}{H}$

(c) $\displaystyle \frac{g H}{L}$

(b) $\displaystyle \frac{\sqrt{2} g H}{L}$