A transformer transforms
A. voltage
B. current
C. power
D. frequency
Answer: Option C
Solution (By Examveda Team)
A transformer is an electrical device that primarily transforms voltage from one level to another. Here's how it works:Voltage transformation:
The main function of a transformer is to change the voltage level of an alternating current (AC). By using electromagnetic induction, it increases (steps up) or decreases (steps down) the voltage.
Current and power:
While a transformer changes the voltage, it indirectly affects the current. The power in a transformer is conserved (neglecting losses), meaning the power on the primary side is approximately equal to the power on the secondary side, assuming ideal conditions. However, the transformer does not transform power directly but maintains it, adjusted for the changes in voltage and current.
Frequency:
The frequency of the electrical signal remains constant through the transformer. It is not affected by the transformation process. In summary, a transformer primarily transforms voltage while maintaining the same frequency and indirectly affecting current and power.
This Question Belongs to Electrical Engineering >> Transformers
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Comments (9)
The purpose of providing an iron core in a transformer is to
A. provide support to windings
B. reduce hysteresis loss
C. decrease the reluctance of the magnetic path
D. reduce eddy current losses
A good voltage regulation of a transformer means
A. output voltage fluctuation from no load to full load is least
B. output voltage fluctuation with power factor is least
C. difference between primary and secondary voltage is least
D. difference between primary and secondary voltage is maximum
If the percentage impedances of the two transformers working in parallel are different, then
A. transformers will be overheated
B. power factors of both the transformers will be same
C. parallel operation will be not possible
D. parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load
An ideal transformer will have maximum efficiency at a load such that
A. copper loss = iron loss
B. copper loss < iron loss
C. copper loss > iron loss
D. none of the above
a transformer transforms voltage generally in proportion to current is changed .. so answer would be voltage
Definition of Transformer: A transformer is a static machine use for transforming power from one circuit to another without changing frequency.
Transferring the power of the transformer will be the correct answer
Explain the simple matter in your own way
Doing!
Note: If MCQ option does not have Power option then Current & Volteg can be given, otherwise not.
We know that transformers are designed based on power And the power on both sides of the transformer is equal to 7
Even if the voltage / current changes
Power remains unchanged, for
We all know P = VI.
So for logical reasons I explained my position with e.g.
Power=v.I
So answer is power
Voltage & current should be answer....
The power is fixed for transformer. It transform voltage only. Thats why we call step up transformer , step down transformer.
The right ans will be voltage...
Option is change
A. Voltage
B.current
C.current & voltage
D.frequency
Which is correct Answer
Voltage is transform
And power is transfer
A voltage would be right answer, as we have different transformer e.g power trafo, distribution trafo where different voltage levels appear on both sides of transformer.
According to NTS Transformer transforms Voltage? and here its Power. So which one is correct?