A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to the temperature of 250 degree Celsius. When left in air at room temperature, what will be their response to cooling?

They will cool at the same rate

Cube will cool faster than sphere but slower than the circular plate

They will cool at the same rate

Circular plate will cool at the slower rate

On a summer day, a scooter rider feels more comfortable while on the move than while at a stop light because

An object in motion captures less radiation

Air has a low specific heat and hence it is cooler

More heat is loss by convection and radiation while in motion

Air is transparent to radiation and hence it is cooler than the body

Explore topic-wise MCQs in Heat Transfer.

This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.

1.	A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to the temperature of 250 degree Celsius. When left in air at room temperature, what will be their response to cooling?
A.	Cube will cool faster than sphere but slower than the circular plate
B.	They will cool at the same rate
C.	Sphere will cool faster
D.	Circular plate will cool at the slower rate
Answer» B. They will cool at the same rate

Discussion

2.	On a summer day, a scooter rider feels more comfortable while on the move than while at a stop light because
A.	An object in motion captures less radiation
B.	Air has a low specific heat and hence it is cooler
C.	More heat is loss by convection and radiation while in motion
D.	Air is transparent to radiation and hence it is cooler than the body
Answer» E.

Discussion