11.In a rotary converter I2R losses as compared to a D.C. generator of the same size will be

12.The internal efficiency of a mercury arc rectifier depends on

13.Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?

14.The voltage drop at anode, in a mercury arc rectifier is due to

15.In a mercury pool rectifier, the voltage drop across its electrodes