44) Mass flow ratio of Ammonia in comparision to Freon-12 for same refrigeration load and same temperature limits of the order of

45) The length of a certain conductor of resistance 100 Ohms is doubled and its cross-sectional area is halved. Its new resistance is

46) The largest number of 100 W electric light bulbs which can be operated from 240 V supply fitted with a 13 A fuse is

47) In a series-wound generator running at constant speed, as the load current increases, the terminal voltage

48) The lowest thermal diffusivity is of