Aim: To observe conduction through a metal rod.
Equipment: A metal rod, a retort stand, clamp, Bunsen burner, Petroleum jelly, 5-10 drawing pins, and a stopwatch.
Method:
- Set up and light a Bunsen burner.
- Smear a small amount of petroleum jelly on the head of each drawing pin.
- Attach the drawing pins at even intervals along the length of the metal rod.
- Clamp the end of the metal rod to the retort stand.
- Position the retort stand so the unclamped end of the metal rod is in the Bunsen burner flame and start the stopwatch.
- Record the time it takes for each one to drop on the table below.
Pin 1: 5s
Pin 2: 27s
Pin 3: 50s
Pin 4: 1:49
