Activity 3.6 Class 10 Science

In this activity we will discuss an experiment about testing electrical conductivity of metals using an electric circuit.

Testing Electrical Conductivity of Metals

Aim of the activity

To test whether a metal conducts electricity

Material Required

   1. Dry cell or battery

   2. Connecting wires

   3. Small bulb with holder

   4. Metal samples

   5. Switch

   6. Insulating board

Procedure

We set up a simple electric circuit using a battery, connecting wires, small bulb and switch. We leave a gap between terminals A and B in which we will place the metal sample to be tested.

Now we place a metal piece (copper, aluminium etc) between terminal A and B and on the switch and observe what happens.

We repeat this activity with different metal samples.

Observation

 

Metal	Does bulb glow?	Observation
Copper	Yes	Good conductor
Aluminium	Yes	Good conductor
Iron	Yes	Conducts electricity
Zinc	Yes	Conducts electricity

 

Explanation

When we pass electricity through the metal sample in the circuit, the bulb glows which indicates that metals conduct electricity.

All metals have free electrons that allow electric current to pass through it.

Conclusion

This activity proves that all metals conduct electricity and this the one of their fundamental physical properties.

Frequently Asked Questions

   1. What property of metals is shown in this activity?

Answer – Electrical conductivity

   2. Do all metals conduct electricity equal?

Answer – No, all metals do not conduct electricity equal.

   3. Why do metals conduct electricity?

Answer – Metals have free electrons which carry electric current.