Transformers In a power or distribution transformer about 10 per cent end turns are heavily insulated to absorb the line surge voltage and save the winding of transformer from damage to reflect the line surge and save the winding of a transformer from damage to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns None of these to absorb the line surge voltage and save the winding of transformer from damage to reflect the line surge and save the winding of a transformer from damage to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ 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 Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers The core type transformer provides _______ Much longer magnetic path Lesser average length per turn None of the listed here Shorter magnetic path Much longer magnetic path Lesser average length per turn None of the listed here Shorter magnetic path ANSWER DOWNLOAD EXAMIANS APP
Transformers No-load current of a transformer has has high magnitude and low power factor has high magnitude and high power factor has small magnitude and low power factor has small magnitude and high power factor has high magnitude and low power factor has high magnitude and high power factor has small magnitude and low power factor has small magnitude and high power factor ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 6250 Ω 25 Ω 250 Ω 62500 Ω 6250 Ω 25 Ω 250 Ω 62500 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum efficiency of a distribution transformer is at no load at 80% full load at full load at 50% full load at no load at 80% full load at full load at 50% full load ANSWER DOWNLOAD EXAMIANS APP
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