The power train devices in a power electronics converter are mounted on a metal base plate 10 cm high × 20 cm wide. The total switching power loss in the devices is 40 W. Determine the temperature rise of the plate due to convection and radiation cooling from both sides of the plate. The ambient air circulating inside the converter cabinet is at 50°C. Also, determine the effective thermal resistance of the plate in units of degrees Celsius per watt.