How do you use the periodic table to recall the ionic charge of an alkali metal, an alkaline earth metal, or aluminum? The positive charge is the group number.

The negative charge is the period number.

The negative charge is the group number.

The positive charge is the period number.

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.