TS Polycet (Polytechnic) 2020 Previous Question Paper with Answers And Model Papers With Complete Analysis

Q) The relation between the speed of wave (v), wavelength (X) and frequency (n) is
A) n = v𝛌
B) 𝛌 = vn
C) 𝛌 = n/v
D) 𝛌 = v/n

Q) The lens which can form real and virtual images is
A) Convex
B) Concave
C) Both Convex and Concave
D) None of these

Q) Which of the following is the formula for magnification of spherical mirror?
A. v/u
B. –v/u
C. h₁/h₀
D. h₀/h₁
A) a and b
B) b and c
C) c and d
D) d and a

Q) Unit of power of a lens
A) cm
B) m
C) dioptre
D) none

Q) If a convex lens is placed in water, its focal length is
A) increases
B) decreases
C) no change
D) none of these

Q) The focal length of eye lens changes between these values.
A) 2.27 cm to 2.5 cm
B) 2.27 cm to 5 cm
C) 2.5 cm to 25 cm
D) 2.5 cm to 50 cm

Q) The relation between focal length and radius of curvature of a spherical mirror is
A) f = R/2
B) f = 2R
C) R = f
D) R = 3f

Q) When objects of different distances are seen which of the following remain constant?
A) Focal length of the eye lens
B) Object distance from eye lens
C) Image distance from eye lens
D) The radii of curvature of eye lens

Q) The minimum distance from a real object to the real image in a concave mirror is equal to
A) 2F
B) F
C) 0
D) F/2

Q) The mirror used as “Rearview” mirror in vehicles is
A) Concave
B) Convex
C) Plane
D) None of these