ICSE Class 10 Physics 2018 Solved Paper

Question : 28 of 78

Marks: +1, -0

How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of coil in them?

Solution:

For a transformer,

{\;\;\text " e.m.f. across the secondary coil "\; ( {\E}_{ {\ s}}) } /{\;\;\text " e.m.f. across the primary coil "\; ( {\E}_{ {\p}}) }

\;=\;{\;\text " number of turns in the secondary coil "\; ( {\N}_{ {\S}}) }/{\;\text " number of turns in the primary coil "\; ( {\N}_{ {\P}}) }

\;\;{E_{ {\ s}}}/{E_p}=\;{N_s}/{N_p}

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