Question

In the arrangement shown in the figure, pins A, B, C, and D are fixed to a
circular metal loop with the help of wax.
Insulator
Metal loop
AB
А A
Pins
Candle
The circular metal loop is heated at the point A with the help of a candle flame.
In which order would the pins fall if AB < AD? Justify your answer.​

Answer 1

Answer:

Given:

In the arrangement shown in the figure, pins A, B, C, and D are fixed to a circular metal loop with the help of wax. The circular metal loop is heated at the point A with the help of a candle flame.

To find:

Order in which the pins will fall

Concept:

The metallic ring is a good conductor of heat. So , when heat is applied at a point, heat gets transmitted to all parts of the metallic ring.

Due to the heat, the wax melts resulting in falling off the pins.

Since AB < AD , heat will reach point B much earlier as compared to point D. And it will reach point C at last.

So , wax will be first be melted at point B , then D and finally at C.