Transformers When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is 48 V 0.75 V 0 V 6 V 48 V 0.75 V 0 V 6 V ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The secondary of a current transformer is always short-circuited under operating conditions because it avoids core saturation and high voltage induction is safe to human beings protects the primary circuit None of these avoids core saturation and high voltage induction is safe to human beings protects the primary circuit None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following insulating materials can withstand the highest temperature safely? Glass fibre Asbestos Cellulose Mica Glass fibre Asbestos Cellulose Mica ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Transformer is not an efficient device Applied voltage is sinusoidal Air is not a good magnetic insulator Iron core has high permeability Transformer is not an efficient device Applied voltage is sinusoidal Air is not a good magnetic insulator Iron core has high permeability ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following acts as a protection against high voltage surges due to lightning and switching? Conservator Breather Thermal overload relays Horn gaps Conservator Breather Thermal overload relays Horn gaps ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS