PHYSICS 10 SCIENCE · 2026–27 · Textbook worked examples · p. 146

Textbook transformer-ratio illustration

An ideal transformer has 5 primary turns and 10 secondary turns. Express output voltage in terms of input voltage.

مثالی ٹرانسفارمر کے ابتدائی5 اور ثانوی10 چکر ہیں۔ ثانوی وولٹیج ابتدائی وولٹیج کے لحاظ سے لکھیں۔

Solution & explanation

  1. Given Np = 5 and Ns = 10.

  2. Use the voltage ratio.

    VsVp=NsNp

  3. Insert turn counts.

    VsVp=105

  4. Divide.

    VsVp=2

  5. Multiply by primary voltage: Vs = 2Vp, a step-up transformer.

Vs = 2Vp

Independent study material · English-medium textbook p. 146 · Original book ↗