Washing machine and method of controlling the same

A method comprising:

• supplying a wash liquid comprising water and a detergent to a washing space of a washing machine;
• sensing, in the washing space, at least one of weight of the wash liquid, volume of the wash liquid, weight of laundry comprising the wash liquid, and volume of the laundry comprising the wash liquid, and providing a sensing result of the sensing;
• and
• forming, in the washing space, an electric field between a first electrode portion in the washing space and a second electrode portion in the washing space, with the laundry comprising the wash liquid being in the washing space, so as to expose the laundry to the electric field when the laundry is between the first electrode portion and the second electrode portion, by supplying alternating current (AC) power at a level corresponding to the sensing result to the second electrode portion.