TS Polycet (Polytechnic) 2022 Previous Question Paper with Answers And Model Papers With Complete Analysis

66) A bulb is marked 60W and 240V. Find the resistance in the bulb.

A) 40Ω
B) 180Ω
C) 960Ω
D) 60Ω

View Answer

C) 960Ω

Explanation: $R = \frac{V^2}{P} = \frac{240^2}{60} = \frac{57600}{60} = 960Ω$

67) The magnification of a concave lens is always

A) equal to one
B) less than one
C) greater than one
D) none of the above

View Answer

B) less than one

Explanation:Concave lens always gives diminished images ⇒ magnification < 1
less than one

68) Angle of vision of a healthy adult human is

A) 10°
B) 60°
C) 90°
D) 40°

View Answer

B) 60°

Explanation:Angle of vision for a healthy human is about 60°

69) In an eye, muscular diaphragm between aqueous humor and the lens is called

A) Iris
B) Pupil
C) Retina
D) Cornca

View Answer

A) Iris

Explanation:Muscle diaphragm in eye = Iris

70) Which of the following is true in case of a concave lens?

A) Erect and virtual image
B) Inverted and virtual image
C) Erect and real image
D) Inverted and real image

View Answer

A) Erect and virtual image

Explanation:Concave lens forms erect and virtual image
Erect and virtual image

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