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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 ?
25 Ω
62500 Ω
250 Ω
6250 Ω
25 Ω
62500 Ω
250 Ω
6250 Ω
Answer
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Related Question
Transformers
The mutual flux in a transformer remains constant at all loads because ______
Leakage flux is small
Iron core is used
Losses are small
Applied voltage and frequency are constant
Leakage flux is small
Iron core is used
Losses are small
Applied voltage and frequency are constant
Answer
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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
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Transformers
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
120 V
12 V
2,400 V
240 V
120 V
12 V
2,400 V
240 V
Answer
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Transformers
Which of the following is not a part of transformer installation?
Breather
Exciter
Buchholz relay
Conservator
Breather
Exciter
Buchholz relay
Conservator
Answer
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Transformers
Which winding of the transformer has less cross-sectional area?
Primary winding
High voltage winding
Low voltage winding
Secondary winding
Primary winding
High voltage winding
Low voltage winding
Secondary winding
Answer
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