In a generator, current is proportional to the wire's speed through the magnetic field. When the wire moves slower, the current is smaller; when it moves faster, the current is larger.

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In a generator, moving a conductor through a magnetic field induces an emf that drives current when the circuit is closed. For a conductor of length ℓ moving perpendicular to the field at speed v, the induced emf is proportional to velocity: E = Bℓv. The current in the circuit then follows I = E/R, so with a roughly constant resistance, current scales with speed. This means when the wire moves slower, the emf and current are smaller; when it moves faster, the emf and current are larger. Hence the correct description is: Smaller; Larger. (Note: in real cases, changes in resistance or other effects can modify the exact current, but the trend with speed holds.)