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A1. A) The more of an electrical load that is demanded of a DC generator, the greater will be the countertorque that is developed by the machine. ...a) true b) false A2). B) The countertorque developed by a DC generator can be used for
a) dynamic braking b) regenerative braking c) either "a" or "b" because they are the same d) neither "a" nor "b"
A3. A) Armature reaction is a distortion of the magnetic field between the pole cores of a DC generator caused by the current flow in the armature winding conductors.
a) true b) false
A4.B) Armature reaction is inversely proportional to the amount of current flow in the armature winding conductors.
a) true b) false
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- Q4. (A)- Indicate whether the following statements are true or false and correct the false statements 1. The inter pole winding is connected in parallel to field winding. 2. The produced sparks at the brushes of a de machine is due to friction losses. 3. Series DC motors are used for low torque applications. 4. In series DC generator, Increasing the load current will decrease the magnitude of the generated voltage. 5. The compensation windings are place at the pole face and used to mitigate the effect of the armature reaction.arrow_forwardA 120-V DC shunt generator has an armature resistance of 1-Ω and a shunt field resistance of 240-Ω. It delivers 9.5-A to a load. Determine the following: (a)What is the total emf generated? Neglect brush drop. (b) What is the total copper loss? (Copper loss in the armature and field) (c) Calculate the stray power losses (d) If the generator requires a mechanical input of 2-hp, what is the efficiency of the machine? (Use 1 hp = 746 W)arrow_forward"Electrical machines/Choose the correct answer, please, with an explanation."arrow_forward
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