13. In a 110-V compound generator, the resistances of the armature, shunt and the series windings are 0.06 N, 25 Q and 0.04 2 respectively. The load consists of 200 lamps each rated at 55 W, 110 V....

Extracted text: 13. In a 110-V compound generator, the resistances of the armature, shunt and the series windings are 0.06 N, 25 Q and 0.04 2 respectively. The load consists of 200 lamps each rated at 55 W, 110 V. Find the total electromotive force and armature current when the machine is connected (i) long shunt (ii) short shunt. Ignore armature reaction and brush drop. [(a) 1200.4, 104.4 A (b) 120.3 V, 104.6 A] (Electrical Machines-I, Bombay Univ. 1979) 14. Armature of a 2-pole, 200-V generator has 400 conductors and runs at 300 r.p.m. Calculate the useful flux per pole. If the number of turns in each field coil is 1200, what is the average value of e.m.f induced in each coil on breaking the field if the flux dies away completely in 0.1 sec ? (JNTU, Hyderabad, 2000)