Can we take one slab of p - type semiconductor and physically
join it to another n - type semiconductor to get p - n junction?

Explanation

To determine whether we can physically join a slab of p-type semiconductor to a slab of n-type semiconductor to create a p-n junction, we can follow these steps:

### Step 1: Understanding P-N Junctions
A p-n junction is formed when p-type and n-type semiconductors are brought together. In a p-type semiconductor, holes (positive charge carriers) are the majority carriers, while in an n-type semiconductor, electrons (negative charge carriers) are the majority carriers.

### Step 2: Physical Joining of Semiconductors
When we attempt to physically join a p-type semiconductor to an n-type semiconductor, we need to ensure that there are no gaps or spaces between the two materials. A continuous interface is essential for the formation of a functional p-n junction.

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