An `L` shaped glass tube is kept inside a bus that is moving with constant acceleration. During the motion, the level of the liquid in the left arm is at `12 cm` whereas of the tube is as shown. Assuming that the diameter of the tube is much smaller then levels of the liquid and neglecting effect of surface tension, acceleration of the bus will be `(g =10 m//s^2)`

Options

A. `1m//s^2`
B. `2m//s^2`
C. `4m//s^2`
D. `5m//s^2`

Answer

B

Explanation

(b) `tan theta = (a)/(g) = (h_2 - h_1)/(h_2 tan 45^@ + h_1 tan 45^@) = (4cm)/(20cm)`
`rArr a = 2m//s^2`