Final answer:
When an impulse travels from a negative to a positive electrode, an induced emf causes a current to flow from the positive electrode to the negative one, in accordance with Lenz's law and the right-hand rule.
Step-by-step explanation:
If an impulse is traveling from a negative electrode to a positive electrode, it implies that a flow of electrons or current is moving towards the higher potential area within a circuit. According to conventional current flow, the direction of current is considered to move from positive to negative outside of the source of emf.
However, in the context of the electrodes, the electrons, which carry a negative charge, are moving towards the positive electrode. As described by Lenz's law, the current will induce a magnetic field that opposes the change in the magnetic flux.
When applying the right-hand rule, one finds the direction of the induced current flow in such a way that it tries to maintain a constant magnetic flux through the circuit loop. Furthermore, traversing from the negative to the positive terminal of an emf is analogous to moving in the same direction as the emf pushes positive charges.