Introduction:
The energy loss in flow through a nozzle and a venturi meter is compared in this question. The options provided are same, more, less, or more/less depending on the flow. The correct answer is option B, which states that the energy loss in flow through a nozzle is more as compared to a venturi meter.

Explanation:
To understand why the energy loss is more in a nozzle as compared to a venturi meter, we need to understand the working principles of both.

Nozzle:
A nozzle is a device that is used to accelerate the flow of a fluid by reducing its cross-sectional area. It is often used in applications where high velocities are required, such as in jet engines or rocket propulsion systems. When the fluid passes through the nozzle, its velocity increases due to the reduction in the cross-sectional area. However, this increase in velocity is accompanied by a decrease in pressure. The Bernoulli's principle explains this phenomenon, which states that as the velocity of a fluid increases, its pressure decreases. Therefore, the energy loss in flow through a nozzle is higher due to the significant decrease in pressure.

Venturi Meter:
A venturi meter is a device that is used to measure the flow rate of a fluid. It consists of a converging section, throat, and a diverging section. The converging section gradually reduces the cross-sectional area of the fluid, which leads to an increase in velocity. At the throat, the cross-sectional area is minimum, resulting in the highest velocity. As the fluid enters the diverging section, its velocity decreases, and the pressure is recovered. The energy loss in flow through a venturi meter is relatively less compared to a nozzle because the pressure recovery in the diverging section helps to minimize the energy loss.

Conclusion:
In conclusion, the energy loss in flow through a nozzle is more as compared to a venturi meter. This is because the reduction in pressure in a nozzle is greater than in a venturi meter due to the higher velocity achieved in the nozzle. It is important to consider the energy loss in flow when selecting the appropriate device for a specific application.