E = Emax/√2 = √2πfrNΦ, fr depends on
A. rotating speed of the armature coil
B. rotating speed of the flux density wave
C. relative velocity between the flux density wave and armature coil
D. any of the mentioned
Answer:A
E = Emax/√2 = √2πfrNΦ, fr depends on
A. rotating speed of the armature coil B. rotating speed of the flux density wave C. relative velocity between the flux density wave and armature coil D. any of the mentioned
Explanation: fr is called the rotational or speed frequency, since its value depends upon the relative velocity between the flux density wave and the armature coil. 4. In AC rotating machines, the generated or speed EMF