Question

Macaroni rising and falling in a pot of boiling water is due what phenomenon

• A. conduction
• B. convection
• C. radiation
• D. none off these

Answer 1

The correct option is B convection

Convection is transfer of heat through fluid (liquid or gas) caused by their molecular motion. in convection, heat current flows in vertically upward direction. Macaroni rising and falling in a pot of boiling water is due to convection. As due to convection, macaroni goes up with heat current and when it reaches the top of pot it is constrained by lid and gravitational force takes it down.