SSC JE Electrical Engineering 2012
For the following questions answer them individually
A lap wound DC generator having 250 armature conductor runs at 1200 rpm. If the generator emf is 200 V, then the operating flux of the DC generator is
Based on revolving field theory, the forward and backward frequencies of the rotor emf of a 4-pole, 50 Hz, single-phase induction motor when running at 1300 rpm in the same direction of the forward field are respectively
Three lamps are in circuit as shown in figure. At what condition 100 W lamp will have the maximum brightness?
Given two coupled inductors $$L_1$$ and $$L_2$$ having their mutual inductance M. The relationship among them must satisfy
If the length of a bar of magnetic material is increased by 20% and the cross-sectional area is decreased by 20% then the reluctance is
Two coupled inductors $$L_1 = 0.2 H$$ and $$L_2 = 0.8 H$$, have coefficient of coupling K = 0.8, The mutual inductance M is
