1. explain that metals are good conductors of electricity with the help of an activity ?
Answers
As we know Metals are good conductors of both heat and electricity.
♦ Here is a simple experiment to test whether metals are good conductors or not.
♦ First Let's take a bulb and metal wire.
♦ If we connect bulb to the a metal wire and connect wire's end through the battery then,then bulb will glow. which shows that metal is good conductor of heat and electricity.
♦ Now take a wooden scale instead of metal wire. And if we connect bulb through a wooden scale,then bulb will not glow. So,this shows it is bad conductor of heat and electricity.
Answer:
Metals are excellent conductors because the atoms in a metal form a matrix through which their outer electrons can move freely. Instead of orbiting their respective metal atoms, they form a "sea" of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
By Activity
Material required :- Cell,Copper Wire,Small LED Bulb/Electric bulb.
Attach the two copper wires to the terminals of the cell and then attach it to the bulb , we will see that bulb will start glowing.