Transformers A no-load test is performed on a transformer to determine magnetising current efficiency magnetising current and loss core loss copper loss magnetising current efficiency magnetising current and loss core loss copper loss ANSWER DOWNLOAD EXAMIANS APP
Transformers In which of the following transformer part of primary winding also serves as the secondary winding? Potential transformer Auto transformer Current transformer Step-up transformer Potential transformer Auto transformer Current transformer Step-up transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be s.N. Ns (l-s)Ns (Ns-l)s s.N. Ns (l-s)Ns (Ns-l)s ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum efficiency of a distribution transformer is at no load at full load at 50% full load at 80% full load at no load at full load at 50% full load at 80% full load ANSWER DOWNLOAD EXAMIANS APP
Transformers When secondary of a current transformer is open-circuited its iron core will be none of above will happen hot because primary will carry heavy current hot because of heavy iron losses taking place in it due to high flux density cool as there is no secondary current none of above will happen hot because primary will carry heavy current hot because of heavy iron losses taking place in it due to high flux density cool as there is no secondary current ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because iron loss is increased considerably secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output iron loss is increased considerably secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
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