PHYSICS 10 SCIENCE · 2026–27 · Textbook worked examples · p. 111

Textbook Example 16.1

A battery does 120 J of work to move 20 C through a circuit. Find potential difference.

بیٹری20 C چارج چلانے میں120 J کام کرتی ہے۔ فرقِ امکانی معلوم کریں۔

Solution & explanation

  1. Given work W = 120 J and charge Q = 20 C.

  2. Voltage is energy transferred per unit charge.

    V=WQ

  3. Substitute.

    V=12020

  4. Cancel a factor of ten.

    V=122

  5. Divide.

    V=6

  6. J C⁻¹ is a volt.

V = 6 V

Independent study material · English-medium textbook p. 111 · Original book ↗