A 20 kW shunt machine having an Armature circuit Resistance of 0.5 Ω and a filed resistance of 120Ω, generates a terminal voltage of 240 V at full load. Find the Efficiency When act as a Generator at full load and act as a Generator at half load and act as a Motor Assume the Iron, Friction and Windage losses are 0.8 kW. I need all steps and draw for it .

A simple generator has a square armature 9.0 cm on a side. The armature has 80 turns of 0.59-mm-diameter copper wire and rotates in a 0.700-T magnetic field. The generator is used to power a lightbulb rated at 12.0 V and 25.0 W. Part A At what rate should the generator rotate to provide 12.0 V to the bulb? Consider the resistance of the wire on the armature. Express your answer to two significant figures and include the appropriate units. HA ? f = Value Units

Q3: A universal fractional horsepower series motor has a resistance of 30 22 and a total inductance of 0.5 H. When connected to a 250 V d.c. supply and loaded to take 0.8 A, it runs at 2000 r.p.m. Estimate the speed and p.f. when connected to a 250 V a.c. supply and loaded to the same current.

Dc generator