We have two coils of copper wire, drawn below. One has a battery connected to it. The other one has a galvonometer connected. If the coil with the voltage is moved closer as shown in the picture, with considerable velocity, what direction will the current induced on the other coil have? The coils are stacked towards the viewer, they are drawn in an escalating manner for clarity. Help me understand why what happens, happens.
Right hand rule
The Attempt at a Solution
First I thought the other coil was going to oppose the rise in magnetic field on the outside, thus the following made sense to me.
However, the following reasoning also seems valid: The coil will most oppose the rise in magnetic field on the inside if the wires are considered virtually dimensionless and perfectly stacked. Then the direction of the current will have the opposite direction.
According to the solutions handbook, the current flows towards the left on the galvanometer and since my knowledge is very limited to just mechanical solving of magnetic fields, I thought I'd ask you guys to cultivate some knowledge on the theory of induction.