A 4-pole, d.c. generator has a wave-wound armature with 792 conductors. The flux per pole is [751.3 r.p.m.] 1. 0.0121 Wb. Determine the speed at which it should be run to generate 240 V on no-load. 2....

Extracted text: A 4-pole, d.c. generator has a wave-wound armature with 792 conductors. The flux per pole is [751.3 r.p.m.] 1. 0.0121 Wb. Determine the speed at which it should be run to generate 240 V on no-load. 2. A 20 kW compound generator works on full-load with a terminal voltage of 230 V. The armature, series and shunt field resistances are 0.1, 0.05 and 115 Q2 respectively. Calculate the generated e.m.f. when the generator is connected short-shunt. [243.25 V] (Elect. Engg. Madras Univ. April, 1978) 3. A d.c. generator generates an e.m.f. of 520 V. It has 2,000 armature conductors, flux per pole of 0.013 Wb, speed of 1200 r.p.m. and the armature winding has four parallel paths. Find the number of poles. [4] (Elect. Technology, Aligarh Univ. 1978) When driven at 1000 r.p.m. with a flux per pole of 0.02 Wb, a d.c. generator has an e.m.f. of 200 V. If the speed is increased to 1100 r.p.m. and at the same time the flux per pole is reduced to 0.019 Wb per pole, [209 V] 4. what is then the induced e.m.f. ?