When an active metal like Al comes in contact with less reactive element like Cu then it produces

Explanation

Galvanic cells, also known as voltaic cells, generate electrical energy through spontaneous redox reactions. When aluminum comes in contact with copper, aluminum tends to oxidize (loses electrons) more readily than copper. This creates a potential difference, and if a conductive path is provided, electrons will flow from aluminum to copper, creating an electrical current. This process is the basis of a galvanic cell.At the aluminum electrode (oxidation):2Al (s)→2Al3+ (aq) +6e-At the copper electrode (reduction):Cu2+ (aq) +2e-→ Cu (s)Combining these two half-reactions gives the overall reaction:2Al (s)+3Cu2+ (aq)→2Al3+ (aq)+3Cu (s)