engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Electrical Machines DC Generators Generator EMF Equation
In a DC machine, let ϕ be the flux per pole, ωm be the armature speed in rad / s, Nc be the number of coil turns in the armature and P be the number of poles. What will be the average coil EMF in that machine?
1
\({E_a} = \dfrac{{\phi {\omega _m}{N_c}}}{P}\)
2
\({E_a} = \dfrac{{\phi {\omega _m}{N_c}P}}{{60}}\)
3
Ea = ϕωmNcP
4
\({E_a} = \dfrac{{\phi {\omega _m}{N_c}P}}{\pi }\)