30) An ideal transformer has 2000 turns on its primary and 200 turn on its secondary. The driving voltage in the primary side is 100 V. A 5 Ohm resistor is connected to the secondary. Calculate the secondary current.

31) The impedance ratio of transformer is equal to

32) Which of the device is a single excited magnetic field system

33) A triplex wave winding will have _____ parallel paths

34) The open circuit characteristic of a DC generator is also called its _____ characteristics