8th Science NCERT Chapter 11

Topics to study from the chapter "Chemical Effects of Electric Current" along with 1-2 lined summaries for each topic:

1. Conduction of Electricity in Liquids:

– Liquids can conduct electricity, and this can be tested using a tester by completing a circuit.

2. Conductivity Testing Activity:

– Demonstrating the conductivity of liquids like lemon juice or vinegar using a tester with a bulb that glows when electricity passes through.

3. Effect of Electric Current on Magnetic Field:

– Understanding how an electric current produces a magnetic effect, seen in the deflection of a compass needle, and using this effect to create another kind of tester.

4. Classification of Materials as Conductors:

– Differentiating between good and poor conductors of electricity based on testing various liquids like tap water, vegetable oil, milk, and honey.

5. Testing Distilled Water Conductivity:

– Testing distilled water to show that it is a poor conductor of electricity and observing how the addition of salt to distilled water makes it a conductor due to the presence of salts.

These topics cover essential concepts regarding the conduction of electricity through liquids and the effects of electric current on different materials.