Year 2024

Week # 2 Quiz 3

Q1. The frequency of e.m.f. generated in an 8-pole alternator running at 900 r.p.m. is

Q2. Find the equation for series field current for a short shunt compound wound generator.
\(\Big (I_a = \) Armature Current, \(I_L=\) Load Current, \(I_{se}=\) Series Field Current and \(I_{sh}=\) Shunt Field Current\(\Big )\)

Q3. In a rotating electrical machine the insulation temperature limit for class B type is

Q4. For generating large currents on D.C. generators which winding is generally used

Q5. Regenerative braking is based on that the back emf is

Q6. A power transformer is a constant_______device

Q7. The magnetic inrush current in transformer is rich in:

Q8. The current flowing in the conductors of a DC motor is

Q9. Breakaway torque in Sychronous motor is equal to

Q10. A synchronous generator connected to infinite bus is over excited. Considering only the reactive power, from the point of view of the system, the machine acts as