A supply of 200 V can be obtained from a source of 600 V by means of a two-winding transformer or an autotransformer. The ratio of weights of conductor material in the autotransformer with respect to the two-winding transformer is _____________.

Question

Question

This question was previously asked in

SSC JE Electrical 9 Oct 2023 Shift 3 Official Paper-I

Answer 1

The correct answer is option no "2".

Concept:-

The ratio of the weight of the conductor material in an autotransformer and two-winding transformer is given by:

\({W_{auto}\over W_{2-wdg}}=1-{N_2\over N_1}\).

Given: Source, V1 = 600 V. V2 = 200 V

\({W_{auto}\over W_{2-wdg}}=1-{200\over 600}\)

\({W_{auto}\over W_{2-wdg}}={2\over 3}\) = 1 ∶ 1.5

Additional Information Conversion from the two-winding transformer to the autotransformer

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