POLYCET (2022) Mock Test Refraction Of Light At Curved Surfaces - 3
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మీకు ఏవైనా కీ లోపాలు దొరికితే లోపాలు మాకు తెలియజేయడానికి వెనుకాడవద్దు.
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Question 1 of 10
1. Question
Reciprocal of focal length in metres is known as the ——of lens
a. Radius of curvature
b. Power
c. Focus
d. Four point -
Question 2 of 10
2. Question
A bird flying in air will appear to a fish inside the water as
a. Farther away than its actual distance
b. Bird doesn’t appear to fish
c. At the same place
d. Closer than its actual distance -
Question 3 of 10
3. Question
S.I. unit of the power of a lens is
a. Meter
b. Dioptre
c. Watt
d. Cm -
Question 4 of 10
4. Question
Which of the following is not an application of total internal reflection ?
a. Sparking of diamond
b. Blue colour of sky
c. Mirage
d. Optical fibre -
Question 5 of 10
5. Question
If a refracted ray is moving away from the normal, then the ray is travelling from…….
a. Rarer medium to rarer medium
b. Denser medium to denser medium
c. Rarer medium to denser medium
d. Denser medium to rarer medium -
Question 6 of 10
6. Question
Convex lens are used in
a. No use
b. Cameras
c. Projectors
d. Projectors & Cameras -
Question 7 of 10
7. Question
Which one of the following is normally used for the preparation of lenses ?
a. Plastic
b. Water
c. All
d. Glass -
Question 8 of 10
8. Question
Assertion: For a erect object having inverted image , linear magnification is negative.
Reason: Linear magnification is the ratio between height of object and height of image.
a. Assertion is wrong and Reason is correct
b. Both assertion and reason are correct
c. Both assertion and reason are wrong
d. Assertion is correct and Reason is wrong -
Question 9 of 10
9. Question
If the refracted ray from a convex lens is travelling parallel to the principal axis, then image distance is
a. Equal to radius of curvature of the lens
b. Equal to object distance
c. Equal to focal length of the lens
d. Infinity -
Question 10 of 10
10. Question
35. In the lens displacement method of determining the focal length of a convex lens , the separation between the screen and the object should be
a. Greater than or equal to 2f
b. Greater than or equal to 4f
c. Greater than or equal to fsquare
d. Greater than or equal to f