Explain why does conductivity of germainum crystals increase on doping with galium ?

Explanation

To explain why the conductivity of germanium crystals increases upon doping with gallium, we can break down the process step by step.

### Step-by-Step Solution:

1. **Understanding Doping**: Doping is the process of adding impurities to a semiconductor to modify its electrical properties. In this case, gallium is the dopant being added to pure germanium.

**Hint**: Remember that doping introduces foreign atoms into the crystal lattice, which can change the electrical characteristics of the material.

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