Question 20

Look at the figure.

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. Which pin will fall first? Explain.

Open in App

Solution

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 because the diameter is smaller than the half circumference of the circle.

Suggest Corrections

Similar questions

Question 13

In the arrangements A and B shown in Figure, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.

Q. In the arrangements A and B shown below, pins P and Q stick to an iron loop and an iron rod with the help of wax. In which case are the both pins likely to fall at different times? Explain.

Q. In the given arrangements pins P and Q are fixed to a plastic and iron rod respectively with the help of wax. In which case is the pin likely to fall without damaging the rod?

Gravitational field at the center of the semicircle formed by thin wire AB of mass m and length l as shown in the figure is:-

A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal sectors as shown in figure. Find the total length of wire required and the area of each sector. [3 MARKS]

Join BYJU'S Learning Program

Explore more

Conduction

Standard VII Physics

Join BYJU'S Learning Program

Question 20 Look at the figure. 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. Which pin will fall first? Explain.

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 because the diameter is smaller than the half circumference of the circle.

Question 20

Look at the figure.

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. Which pin will fall first? Explain.