Chemical effects of electric current activity 14.2
Answers
Answer:
National Council of Educational Research and Training (NCERT) Book for Class VIII
Subject: Science
Chapter: Chapter 14 – Cheamical Effects of Electrical Current
Class VIII NCERT Science Text Book Chapter 14 Cheamical Effects of Electrical Current is given below.
Your elders might have cautioned you against touching an electrical appliance with wet hands. But do you know why it is dangerous to touch an electrical appliance with wet hands?
We have learnt earlier that the materials, which allow electric current to pass through them, are good conductors of electricity. On the other hand, materials, which do not allow electric current to pass through them easily, are poor conductors of electricity.
In Class VI, we made a tester (Fig.14.1) to test whether a particular material allows the electric current to pass through it or not. Do you recall how the tester helped us in deciding that?
We found that metals such as copper and aluminium conduct electricity whereas materials such as rubber,plastic and wood do not conduct electricity. However, so far we have used our tester to test materials which were in solid state. But what about liquids?Do liquids also conduct electricity? Let us find out.
Activity 14.2 with diagram
