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 2 KW. 8 KW. 10 KW. 0. 2 KW. 8 KW. 10 KW. 0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 200 V. 230 V. 460 V. 115 V. 200 V. 230 V. 460 V. 115 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of cage rotors offers the following advantages less noise. locking tendency is reduced. all of below. uniform torque. less noise. locking tendency is reduced. all of below. uniform torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Terminal voltage is same Frequency should be same Speed of alternators should be same Both 1and 2 Terminal voltage is same Frequency should be same Speed of alternators should be same Both 1and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature resistance. increasing input power of the prime mover. increasing terminal voltage. increasing armature cooling. increasing armature resistance. increasing input power of the prime mover. increasing terminal voltage. increasing armature cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? rotates same direction stationary None of these rotates opposite direction rotates same direction stationary None of these rotates opposite direction ANSWER DOWNLOAD EXAMIANS APP
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