आखिर 1 Iron Nail पे 10 Iron Nail कैसे Balance करे?

The rusting of iron nail

Suppose we have an iron nail and an iron ball of same mass. When submerged in water, the iron ball may float but the nail alway sinks. This is because

Fill in the following blanks with suitable words : When an electric current is passed through a coil wrapped around an iron nail, the iron nail behaves like a ________.

Rusting of an iron nail is a reaction.