Speed of efflux is V in a tank if the tank is placed on 2m high then speed of efflux will be
Correct answer: D. √2gh
- A. √4gh
- B. √2v
- C. √2gh/2
- D. √2gh
Explanation
The speed of efflux through an orifice at the bottom of a tank is determined by Torricelli's Law, which is derived from Bernoulli's principle. According to this law, the efflux speed V is √(2gh), where g is the acceleration due to gravity, and h is the height of the fluid column above the orifice. The height of the tank itself (such as being placed 2m high) does not affect the speed of efflux unless it changes the height of the fluid column above the orifice. Option A incorrectly assumes an additional factor in the equation. Option B incorrectly modifies V without proper basis, and Option C incorrectly divides the correct formula by 2. Therefore, Option D is the correct answer.
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