# Physics Quiz on Optical Instrument for IIT JEE, NEET, Medical & Engineering Exam

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## Physics Quiz on Optical Instrument

Physics Quiz on Optical Instrument: Previous trends reveal that NEET aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations. In this post we are providing you Physics quiz on Optical Instrument

## Physics Quiz on Optical Instrument

Q1. Magnification of astronomical telescope is _________.
a) f0 + fe
b) f0/fe
c) fe/f0
d) (1+f0/fe)L/f0

b) f0/fe

Q2. 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) 20
d) 30

a) 5

Q3. Magnifying power of a simple microscope _________.
a) Increases with increase in focal length
b) Increases with the decrease in focal length
c) Least distance of distinct vision
d) No effect with decrease or increase with the focal length

b) Increases with the decrease in focal length

Q4. 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

a) 200 cm

Q5. 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

b) Converging (or convex) lens

Q6. 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 m
d) 0.54 m

c) 0.26 m

Q7. The diameter of a lens is called __________.
a) Focal length
b) Principle axis
c) Aperture

c) Aperture

Q8. 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

a) 18 cm, 2 cm

Q9. The power of a concave lens is ________.
a) Real
b) Virtual
c) Positive
d) Negative

d) Negative

Q10. In going from a denser to rarer medium a ray of light is _________.
a) Undeviated
b) Polarised
c) Bent away from the normal
d) Bent towards the normal

c) Bent away from the normal