The difference between electronic (not electronical) and electrical is that electrical is a more general term, referring to the use of electricity in an item for instance. All items that are electronic are also electrical, but not all items that are electrical are electronic.
I don't know nearly enough about the field of electronics to explain the distinction better than this, so I include also a quote from the World English Dictionary:
Electronic is used to refer to equipment, such as television sets, computers, etc, in which the current is controlled by transistors, valves, and similar components and also to the components themselves. Electrical is used in a more general sense, often to refer to the use of electricity as a whole as opposed to other forms of energy: electrical engineering; an electrical appliance. Electric, in many cases used interchangeably with electrical, is often restricted to the description of particular devices or to concepts relating to the flow of current: electric fire; electric charge
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