DSSSB TGT c10lensformula — practice questions
12 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice DSSSB TGT c10lensformula in the app →Per NCERT Class 10 Physics, what is the LENS FORMULA?Per NCERT, what is the magnification (m) formula for a LENS — in terms of v and u?Per NCERT, what is the sign convention for FOCAL LENGTH (f) of a CONVEX lens vs a CONCAVE lens?Per NCERT Example 9.3, a concave lens (f = −15 cm) forms an image at v = −10 cm. What is the object distance uPer NCERT Example 9.4, a convex lens (f = +10 cm) has an object at u = −15 cm. What is the image distance v?Per NCERT Example 9.4, for the same convex lens problem (f=+10, u=−15), what is the MAGNIFICATION?Per NCERT, what is the POWER (P) of a LENS — and what is its SI unit?Per NCERT, what is 1 DIOPTRE — the SI unit of lens power?Per NCERT, if a lens has POWER = +2.0 D, what is its FOCAL LENGTH — and is it convex or concave?Per NCERT, if a lens has POWER = −2.5 D, what is its FOCAL LENGTH — and is it convex or concave?Per NCERT, when several LENSES are placed in CONTACT, what is the NET POWER?Per NCERT, a combination of two lenses of power +2.0 D and +0.25 D in contact is equivalent to a SINGLE lens o