NextMockपरीक्षा शोधा, उदा. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · प्रश्न 91

What type of lens is used in a magnifying glass?

  1. Plano-concave
  2. Convex lens
  3. Convex mirror
  4. Concave lens
  5. None of the above / More than one of the above
उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (B) Convex lens

स्पष्टीकरण

A simple magnifier is a convex lens held so the object is within its focal length.

  • (A) चूक

    Wrong: concave lenses diminish.

  • (B) बरोबर

    Correct: a convex lens gives a magnified virtual image when the object is within focus.

  • (C) चूक

    Wrong: a mirror, not a lens.

  • (D) चूक

    Wrong: diminishes images.

  • (E) चूक

    Wrong: only one of the options A–D is correct.