Electronic aerosol provision systems

A cartridge for use in an aerosol provision system for generating an aerosol from a source liquid, the cartridge comprising:

• a reservoir of source liquid;
• a planar vaporizer comprising a planar heating element, wherein the vaporizer is configured to draw source liquid from the reservoir to the vicinity of a vaporizing surface of the vaporizer through capillary action, and
• wherein the planar heating element is susceptible to induced current flow from an induction heater coil of the aerosol provision system to inductively heat the heating element and so vaporize a portion of the source liquid in the vicinity of the vaporizing surface of the vaporizer, wherein the planar heating element is oriented so that magnetic fields generated by the induction heater coil when the cartridge is in use in the aerosol provision system in at least a region of the planar heating element are generally perpendicular to the plane of the planar heating element.

A method of generating an aerosol from a source liquid, the method comprising:

• providing a reservoir of source liquid and a planar vaporizer comprising a planar heating element, wherein the vaporizer draws source liquid from the reservoir to the vicinity of a vaporizing surface of the vaporizer by capillary action;
• and
• driving an induction heater coil to induce current flow in the heating element to inductively heat the heating element and so vaporize a portion of the source liquid in the vicinity of the vaporizing surface of the vaporizer by generating magnetic fields in at least a region of the planar heating element that are generally perpendicular to the plane of the planar heating element.