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ICSE Class 10 Physics Question 8 of 25

Solved 2025 Specimen Paper ICSE Class 10 Physics — Question 21

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Question

Question 3(iii)

A transformer is used to change a high alternating e.m.f. to a low alternating e.m.f. of the same frequency.

(a) Identify the type of transformer used for the above purpose.

(b) State whether the turns ratio of the above transformer is = 1 or > 1 or < 1.

Answer

(a) Step down transformer since it is used to change a high alternating voltage to a low alternating voltage.

(b) Turns ratio is n < 1, i.e., number of turns in the secondary are less than the number of turns in the primary.