the problem is that,if i apply the solder(lead) on the soldering iron,the lead is liquified and it is not easily dropping out of the tip of the soldering iron,instead it gets stuck at the tip of the soldering iron,i have to make it to drop on the soldering junction by myself!i think the coating of the soldering tip has completely disappeared!please help me guys!
The soldering iron heats the parts to be soldered together then the rosin-core solder is applied to the parts. In one second they will be soldered together and the soldering iron can be moved away.
About how to use a soldering iron is very practical and it is naturally very difficult to explain with words on a forum. You may find some one who can teach you the same in practical at your loaction.
As i see you have ample questions in your list which is almost flooding the forum with 7-8 silly posts a day.
A very cheap poor quality soldering iron does not solder well. It gets too hot which causes its tip to corrode and to burn away the important flux.
My soldering iron is about 44 years old (a Weller) and has temperature control so it is never too hot.
Its tips are plated and seem to last almost forever.