A group of students investigated the properties of an electrophorus similar to the one shown here. The conducting plate is shown with an induced separation of charge light bulb charged styrofoam insulated base conducting plate 2. If the light bulb wire is grounded then electrons will flow from ground to the conducting plate electrons will remain stationary in the conducting plate. positive charge will flow from ground into the conducting plate electrons will flow from the conducting plate to ground 3. What must have been the charge on the insulated base? O neutral O negative O positive O no charge