A 100 Ω resistor carrying a constant of 0.5 A is kept at a constant temperature of 300 K by a stream of cooling water. In a time interval of 30 minutes what are the changes in entropy for the resistor and that of the universe respectively?
(a) 0 and 150 J/K (b) 150 J/K and 0 (c) 300 J/K and 0 (d) 0 and 300 J/K