PHYSICS 10 SCIENCE · 2026–27 · From the chapter · exam-style questions · p. 77

Original MCQ based on chapter text

The power of a lens of focal length −0.25 m is:

−0.25 m فوکل لمبائی والے عدسے کی طاقت ہے:

  1. (a)

    −4 D

    −4 D

  2. (b)

    +4 D

    +4 D

  3. (c)

    −0.25 D

    −0.25 D

  4. (d)

    +0.25 D

    +0.25 D

حل اور وضاحت

درست انتخاب: (a)

(a) P = 1/f = 1/(−0.25) = −4 D۔

Independent study material · English-medium textbook p. 77 · Original book ↗