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Transformers
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
9 V
90 V
0.9 V
900 V
9 V
90 V
0.9 V
900 V
Answer
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Related Question
Transformers
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is
equal to the primary current
four times the primary current
one-fourth the primary current and equal to the primary current
one-fourth the primary current
equal to the primary current
four times the primary current
one-fourth the primary current and equal to the primary current
one-fourth the primary current
Answer
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Transformers
A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
0.85 V
1 V
1.7 V
0 V
0.85 V
1 V
1.7 V
0 V
Answer
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Transformers
We can find _______of the transformer with open circuit test.
Total equivalent resistance
Total equivalent leakage reactance
Turn ratio
Copper losses
Total equivalent resistance
Total equivalent leakage reactance
Turn ratio
Copper losses
Answer
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Transformers
In a transformer the energy is conveyed from primary to secondary
None of these
through air
by the flux
through cooling coil
None of these
through air
by the flux
through cooling coil
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
12 V
240 V
2,400 V
120 V
12 V
240 V
2,400 V
120 V
Answer
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