Physics MCQs

852 MCQs  (Page 16 of 86)

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The minimum distance between an object and its real image in a convex lens is_____________?
A. 2 f
B. 2.5 f
C. 3f
D. 4f
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Dioptre power of an concave lens of 10 cm focal length is_______________?
A. 10 dioptre
B. 10 dioptre
C. 1 / 10 dioptre
D. 1 / 10 dioptre
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A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?
A. Center of curvature
B. Focus
C. Optical center
D. Aperture
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If an object is placed away from 2f of a converging lens then the image will be_______________?
A. Real and erect
B. Virtual and erect
C. Real and inverted
D. Virtual
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Magnifying power of simple microscope______________?
A. Increase with increase in focal length
B. Increase with decrease in focal length
C. No effect with decrease or increase with focal length
D. List distance of distinct vision
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The least distance of distinct vision for a normal eye is_______________?
A. 15 cm
B. 25 cm
C. 30 cm
D. 40 cm
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If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
A. Chromatic aberration
B. Spherical aberration
C. Both spherical and chromatic
D. Distortion
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A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?
A. F2 + f1
B. F2 – f1
C. F1f2/f2+f1
D. F1f2/f1-f2
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In multimode step index fibre the refractive index of core and cladding is____________?
A. Same
B. Different
C. Zero
D. Different with refractive index of core higher than cladding
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Final image produced by a compound microscope is_____________?
A. Real and inverted
B. Real and erect
C. Virtual and erect
D. Virtual and inverted
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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