Why is much less heat generated in long electric cables than in the filament of an electric bulb ?

Explanation

To understand why much less heat is generated in long electric cables than in the filament of an electric bulb, we can analyze the factors affecting heat generation in both cases.

### Step-by-Step Solution:

1. **Understanding Heat Generation**:
The heat generated in a conductor is given by the formula:
\[
H = I^2 R t
...