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Define the term doping. Pure silicon is ...

Define the term doping. Pure silicon is an insulator. Silicon doped with phosphorus is a semiconductor. Silicon doped with gallium is also a semi-conductor. What is difference between the two types of semi-conductors ?

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Pure silicon doped with phosphorus is :

Pure silicon doped with phosphorus is:

Account the following : Silicon is an insulator but silicon doped with phosphorus acts as a semiconductor.

What are semi-conductors ? Describe the two main types of semi- conductors.

Silicon doped with arsenic is an example of :

How will you account for the fact that silicon is an insulator but silicond doped with phosphorus acts as semi-conductor ?

Although pure silicon is an insulator, then how does it behave as semi-conductor on heating ?

Why is phosphours doped silicon a semi-conductor?