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ICSE Class 10 Physics Question 19 of 20

Electro-magnetism — Question 20

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Question 20

Name the transformer used in the (i) power generating station, (ii) power sub station. State the function of each transformer.

Answer

The transformer used in the —

(i) Power generating station — Step up transformer is used in Power generating station to increase the alternating voltage from 11 kV to 132 kV.

(ii) Power sub station — Step down transformer is used in Power sub station to decrease the alternating voltage from 132 kV to 33 kV and then further to 11 kV and to 220 V.