In magnets , there are north and south poles. According to the law of electromagnetism, it states that “like poles repel and opposite poles attracts” so when 2 magnets are brought together, the North Pole attracts the South Pole and charges leave the North Pole to the South Pole. Using coins, the force of attraction decreases with an increase in the metal hence if u put a coin, the force between them would decrease with an increase in the coins until a point where there would be no electromagnetic force hence no coin would attract...
