A step up transformer operates on a 230V line and a load current of 2A. The ratio of the primary and secondary windings is 1:25. The current in the primary is

25 A

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50 A

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15 A

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12.5 A

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Solution

The correct option is B 50 A
For a transformer $\frac{I_{p}}{I_{s}} = \frac{N_{s}}{N_{p}} i . e ., I_{p} = \frac{N_{s}}{N_{p}} \times I_{s} = \frac{25}{1} \times 2 = 50 A$ .

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A step up transformer operates on a 230V line and a load current of 2A. The ratio of the primary and secondary windings is 1:25. The current in the primary is

The correct option is B 50 AFor a transformer IpIs=NsNp i.e.,Ip=NsNp×Is=251×2=50A.

The correct option is B 50 A
For a transformer $\frac{I_{p}}{I_{s}} = \frac{N_{s}}{N_{p}} i . e ., I_{p} = \frac{N_{s}}{N_{p}} \times I_{s} = \frac{25}{1} \times 2 = 50 A$ .