Electrical Machines In a transformer, the frequency of a voltage at the secondary is any of the above. equal to primary. greater than the primary. less than primary. any of the above. equal to primary. greater than the primary. less than primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf increases upto a limit and then remains almost constant. remains constant. increases. decreases. increases upto a limit and then remains almost constant. remains constant. increases. decreases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to earth. to a DC source. to an AC source. in reverse. to earth. to a DC source. to an AC source. in reverse. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following losses are negligible in blocked rotor test? iron loss both A and B mechanical loss copper loss iron loss both A and B mechanical loss copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of the rotor bars of dc motors are laminated to reduce hysteresis loss. to reduce mechanical losses. to provide better flux linkage. to reduce eddy current loss. to reduce hysteresis loss. to reduce mechanical losses. to provide better flux linkage. to reduce eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is increased. modified. reversed. none of these. increased. modified. reversed. none of these. ANSWER DOWNLOAD EXAMIANS APP
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