1. Draw the magnetization curve of the generator results of run (1)? 2. Draw the external characteristics at N= constant. And discusses the results? 3. Got out the internal charact. From the external charact.? 4. Explain the effect of speed on the open circuit char.?

Question-1: The induced magnetic force, given by Find = i (Lx B), is called motor action and the induced magnetic force, given by eina = (V × B). L, is called generator action. a) Explain the role of induced forces in generators when we expect generators to be all about induced voltages and not induced forces? b) Explain the role of induced voltages in motors when we expect motors to be all about induced forces and not induced voltages?

× 4:03 K s.eng.ruh.ac.lk □ Û 8. Figure 4 shows the core of a simple dc motor. The magnetization curve for the metal in this core is given by Figure 5 and Figure 6. Assume that the cross-sectional area of each air gap is 18 cm² and that the width of each air gap is 0.05 cm. The effective diameter of the rotor core is 4 cm. L It is desired to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core? ii. What would be the total flux in the core at the flux density of part (i)? iii. The maximum possible field current for this machine is I A. Select a reasonable number of turns of wire to provide the desired flux density while not exceeding the maximum available current. Flux Density, B (T) 2.8 སྤྲ ཤཱ ཀ ཀཱ བྷ ཀ ཡཱཾ བ ་ 1.2 1.0 0.4 0.2 4-48cm Figure 4 0 10 20 30 40 50 100 → Depth 4 cm -0.05 cm 200 300 500 1000 2000 Magnetizing Intensity, H (A.turns/m) Figure 5 Magnetization curve…