Conductors

Physics

ELECTRONICS

ELECTRONICS.

Conductors, insulators and semi-conductors

i) An insulatoris a material or object which resists flow of heat (thermal insulator) or electrical charges (electrical insulators). Examples are paraffin, wood, rubber, plastics etc.
ii) Conductorsare materials that contain free electrons which carry an electrical charge from one point to another.

Examples are metals and non-metals like carbon, graphite etc.

iii) Semi-conductors are materials or objects which allow the flow of electrical heat or energy through them under certain conditions i.e. temperature. Examples are germanium, silicon, cadmium sulphide, gallium arsenide etc.

Chemistry

EFFECT OF AN ELECTRIC CURRENT ON SUBSTANCES

EFFECT OF AN ELECTRIC CURRENT ON SUBSTANCES.

Introduction

In any chemical reaction, the existing chemical bonds are broken and new chemical bonds are formed.

Hence, all chemical reactions are fundamentally electrical in nature since electrons are involved in some way or the other in all types of chemical bonding.