Calculate heat produced in five minutes across a resistor of `20 Omega` when 3A current flows through it .

Explanation

To calculate the heat produced across a resistor when a current flows through it, we can use the formula:

\[ H = I^2 \times R \times T \]

Where:
- \( H \) is the heat produced (in joules),
- \( I \) is the current (in amperes),
- \( R \) is the resistance (in ohms),
...