Electrical Machines When Flemings right hand rule to find the direction of induced emf, the thumb points towards opposite to the direction of motion of the conductor. direction of flux. direction of induced emf. direction of motion of the conductor. opposite to the direction of motion of the conductor. direction of flux. direction of induced emf. direction of motion of the conductor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 2, 6 1, 3, 5 1, 2, 5 1, 4, 6 1, 2, 6 1, 3, 5 1, 2, 5 1, 4, 6 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the air gap of IM is increased, ____________ will increase. speed. magnetizing current. air gap flux. power factor. speed. magnetizing current. air gap flux. power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is 10 KW. 8 KW. 2 KW. 0. 10 KW. 8 KW. 2 KW. 0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The crawling in the induction motor is caused by low voltage supply high loads harmonics developed in the motor improper design of stator laminations low voltage supply high loads harmonics developed in the motor improper design of stator laminations ANSWER DOWNLOAD EXAMIANS APP
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