Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 12 V 120 V 2,400 V 240 V 12 V 120 V 2,400 V 240 V ANSWER DOWNLOAD EXAMIANS APP
Transformers When the secondary of a transformer is short circuited, the primary inductance _______ Is increased Is decreased None of the listed here Remians unchanged Is increased Is decreased None of the listed here Remians unchanged ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ Increase copper losses Cause voltage drop in the windings None of the listed here Decreases copper losses Increase copper losses Cause voltage drop in the windings None of the listed here Decreases copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer routine efficiency depends upon Load current Supply frequency Both power factor and load current Power factor of load Load current Supply frequency Both power factor and load current Power factor of load ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Power transformer Auto transformer Potential transformer Current transformer Power transformer Auto transformer Potential transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses electric coupling Is a static device Uses capacitive coupling Uses inductive coupling Uses electric coupling Is a static device Uses capacitive coupling Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
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