Improve the bracketed part of the sentence. In the eighteenth century, Japan's feudal overlords, from the shogun to the humblest samurai, found themselves (on) financial stress.
Electric power is the rate per unit time, at which electrical energy is transferred by an electric circuit. The power of electricity is measured in watts and kilo watts.
1 Watt is the unit of electrical power equal to one ampere under the pressure of one volt.