Balancing Coins
Electricity and Magnetism
Level
1
It is very difficult to balance coins on their edge. However, when a magnet is used, this becomes much easier, as seen above.
What best explains this?
Only the coins in contact with the magnet get magnetized
All the coins get magnetized and attract each other
The magnet repels the coins
The magnetic force cancels the gravitational force
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1 solution
Due to the magnetic field, the coins made of iron get magnetised by induction and align themselves like (NS)-(NS)...-(NS)-[N S]. As the field gets gets weaker it becomes difficult to stack more coins