When an electric current forms in a loop, the magnetic field generated will be c

Question

When an electric current forms in a loop, the magnetic field generated will be concentrated inside the loop but will not be as strong outside the loop. With this in mind, and considering any other factors, do you think the effect described in the previous several questions will be greater for:

a) The magnets falling inside the copper pipe
b) The magnets falling outside the copper pipe
c) The marble falling inside the copper pipe
d) The marble falling outside the copper pipe
e) The magnets falling inside the plastic pipe

Explanation / Answer

a) The magnets falling inside the copper pipe

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