NEET Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Optical Instrument Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.
MCQs on Optical Instrument
1. A lens which converges a beam of parallel rays to a point is called
(a) Diverging (or concave) lens
(b) Converging (or convex) lens
(c) Plano concave lens
(d) Plano-convex lens
Answer
Answer: (b) Converging (or convex) lens
2. The diameter of a lens is called
(a) Focal length
(b) Principle axis
(c) Aperture
(d) Radius of curvature
Answer
Answer: (c) Aperture
3. In going from a denser to rarer medium a ray of light is
(a) Undeviated
(b) Bent away from the normal
(c) Bent towards the normal
(d) polarised
Answer
Answer: (b) Bent away from the normal
4. The power of a concave lens is
(a) Real
(b) Virtual
(c) Positive
(d) negative
Answer
Answer: (d) negative
5. Magnifying power of a simple microscope
(a) Increases with increase in focal length
(b) Increases with the decrease in focal length
(c) No effect with decrease or increase with the focal length
(d) Least distance of distinct vision
Answer
Answer: (b) Increases with the decrease in focal length
6. Magnification of astronomical telescope is
(a) f0 + fe
(b) f0/fe
(c) fe/f0
(d) (1+f0/fe)L/f0
Answer
Answer: (b) f0/fe
7. The magnifying power of an astronomical telescope is 10 and the focal length of its eye-piece is 20 cm. The focal length of its objective will be
(a) 200 cm
(b) 2 cm
(c) 0.5 cm
(d) 0.5 x 10–2 cm
Answer
Answer: (a) 200 cm
8. The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye-piece is found to be 20 cm. The focal lengths of the lenses are
(a) 18 cm, 2 cm
(b) 11 cm, 9 cm
(c) 10 cm, 10 cm
(d) 15 cm, 5 cm
Answer
Answer: (a) 18 cm, 2 cm
9. In a compound microscope, magnifying power is 95 and the distance of the object from the objective lens is 1/38 cm. The focal length of the objective lens ¼ cm. What is the magnification of eyepiece?
(a) 5
(b) 10
(c) 100
(d) 200
Answer
Answer: (a) 5
10. A hypermetropic person having “near point” at a distance of 0.75 m puts on spectacles of power 2.5 D. The “near point” now is at
(a) 0.75 m
(b) 0.83 m
(c) 0.26 cm
(d) 0.26 m
Answer
Answer: (d) 0.26 m