Look at figures given below. The length of wire PQ in case of A is equal to the diameter of the semicircle formed by the wire CDE, in case B

cbse
cbse-class-7-science
science-heat

#1

Look at figures given below.image
The length of wire PQ in case of A is equal to the diameter of the semicircle formed by the wire CDE, in case B. One pin is attached to each wire with the help of wax as shown in figure above. Which pin will fall first? Explain.

Answer:
The pin on the wire in case A will fall first as heat will reach to it before it reaches the pin in case B.