Sketch a graph showing variation of resistivity with temperature of (i) Copper (ii) Carbon.

Explanation

To sketch the graphs showing the variation of resistivity with temperature for Copper and Carbon, we need to understand how resistivity changes with temperature for these two materials.

### Step-by-Step Solution:

1. **Understanding Resistivity and Temperature Relationship**:
- For metals like Copper, resistivity increases with an increase in temperature. This is because as temperature rises, the lattice vibrations in the metal increase, leading to more collisions between conduction electrons and lattice ions, which increases resistivity.
- For non-metals like Carbon (specifically in its graphite form), resistivity decreases with an increase in temperature. This is because the increased thermal energy allows more charge carriers to become available, thus reducing resistivity.

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