Why is semiconductor damaged by a strong current?

Why semiconductors are doped?

Define semiconductor?

What is n-type semiconductor ?

What is the direction of motion of the holes in a semiconductor during the flow of current?

A n-type semiconductor is:

Fill in the blanks: When a battery is connected to a p-type semiconductor with metallic wire ,the current in the semiconductor is predominantly due to .........(electrons, holes)

What is a semiconductor? Describe the two main types of semiconductors and contast their conduction mechanism.