The current in the pure Inductor lags the voltage across it by 90 degrees.
When a time varying voltage (for example, a sine wave) applied across a pure inductor , an opposing voltage called “back” emf is produced by the inductor due to its self-inductance. This back emf opposes and limits the current flowing in the inductor. Therefore, current through the inductor cannot follow the voltage across it and it always lags behind it. In a purely inductive circuit, the current always “lags” behind the voltage by 90 degrees.

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