a certain requires that either 160w or 75 w be sullied to a 48v batttery from a 120v rms 60hz ac source. there is a two position switch on a control panel set at either 160 or 75 w. design a single circuit to deliver both values of power. the internal resistance of the battery is 0.1 ? specify what the control switch will do? specify the values of all of the components in circuit?