Question

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 4.9. Which pin will fall first? Explain.

Answer 1

Explanation:

According to the given condition, pin on the wire in Figure 'A" will go down first as heat will reach it before it reaches the pin in figure 'B'.