92. A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above room temperature. When left to cool in the room, which of them will reach the room temperature first?

(a) Circular plate

No worries! We‘ve got your back. Try BYJU‘S free classes today!

(b) Cube

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

(d) All of them will reach the room temperature at the same time

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
(c) Sphere

(C)
The loss of heat is directly proportional to the
surface area, hence loss of heat will be earlier in case

of sphere because it has the maximum surface area.

Suggest Corrections

Similar questions

Q. A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20° C above room temperature. When left to cool in the room, which of them will reach the room temperature first?

Q. A hollow sphere of radius

R

, a hollow cube of side

R

and thin circular plate of radius

R

made up of the same material, are all heated to

20^{\circ} C

above room temperature. When left to cool in the room, which of them will reach the room temperature first?

A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to a temperature of $1000^{\circ} C$ . Which one of these will cool first

Q. A sphere, a cube and a thin circular plate are made of same material and all have same mass. These are heated to

200^{\circ} C

and then placed in a room. Then the

Q. A solid sphere, a cube and a plate, are made of the same material and all have same mass. These are heated to a temperature

100^{\circ} C

and then allowed to cool at the temperature of the room. Which of these will cool down first –

Join BYJU'S Learning Program

92. A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above room temperature. When left to cool in the room, which of them will reach the room temperature first?

The correct option is C (c) Sphere (C) The loss of heat is directly proportional to the surface area, hence loss of heat will be earlier in case of sphere because it has the maximum surface area.

The correct option is C
(c) Sphere

(C)
The loss of heat is directly proportional to the
surface area, hence loss of heat will be earlier in case

of sphere because it has the maximum surface area.