Electrical Machines At the instant of starting, the per unit slip of 3 - Φ induction motor is 0.1. 0.5. 1.0. 0.05. 0.1. 0.5. 1.0. 0.05. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will remain the same. It will be halved. It will be doubled. It will becomes four times. It will remain the same. It will be halved. It will be doubled. It will becomes four times. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, hysteresis and eddy current losses depend upon maximum flux density both 2 and 3 load current supply frequency maximum flux density both 2 and 3 load current supply frequency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to presence of commutator. armature reaction. high resistance of carbon brushes. reactance voltage. presence of commutator. armature reaction. high resistance of carbon brushes. reactance voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the armature reaction results in demagnetization of leading & magnetization of trailing pole tip. demagnetization of centers of poles. magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of leading & magnetization of trailing pole tip. demagnetization of centers of poles. magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 440 A. 44 A. 40 A. 400 A. 440 A. 44 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
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