Question

Rate of heating in forced convection experiment can be increased by

• A. increasing the speed of flow of liquid accross the heated section.
• B. increasing the surface area of contact of water with heated section.
• C. decreasing the thermal conductivity of fluid flowing.
• D. increasing the thermal conductivity of heated container

Answer 1

Answer: (A), (B), (D)

increasing the speed of flow of liquid accross the heated section.
increasing the surface area of contact of water with heated section.
increasing the thermal conductivity of heated container

Rate of heating in forced convection experiment can be increased by:

1. Increasing the speed of flow of liquid across the heated section. As forced convection is a mechanism in which external force or energy to transfer heat from the body. Since more the speed, more the heat transfer, more the rate of heating.
2. Increasing the surface area of water with heated section. By doing so; more heat energy will be transferred to the water and hence increases the rate of heating.
3. Increasing the thermal conductivity. On increasing the thermal conductivity; heat transfer capability increases. So, more the heat getting transferred, more the rate of heating.