Question

with the help of a labelled diagram, suggest an experiment to show that metals are good conductors of heat

Answer 1

Answer:

Here is your answer

Explanation:

Materials:

- a battery

- an electric light bulb and socket

- three wires with alligator clips

- a glass drinking cup or a beaker

- distilled water

- two electrodes of the same material

(for example copper)

- table salt

- an ammeter

Using the various items listed above, construct the device shown in figure 1 (which is known as a continuity tester). As you can see, there is a break in the electrical path between the battery and the lamp. Using various household items (such as a plastic pen, an eraser, a ceramic plate, etc.) try to complete the circuit and see if the lamp lights.

You will notice that metallic items cause the lamp to light while most others do not. Try using the graphite (also known as the 'lead') from a pencil. You will notice that this material allows the bulb to light although perhaps not as brightly, depending on how long or short the graphite is. This is because the graphite, although a conductor presents a certain amount of resistance to the flow of electricity. Using this device, we can characterize solid materials as either conductors or non-conductors. Non conductors are also known as insulators. There are many solid materials that have intermediate properties between conductors and insulators, like graphite.