Physics MCQs

852 MCQs  (Page 15 of 86)

Attempt Physics Quiz
The equation θ = 1.22 λ/D was devised by_______________?
A. Newton
B. Einstein
C. Raleigh
D. Planks
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Michelson calculated the speed of light using the instruments______________?
A. Spectrometer
B. Galvanometer
C. Interferometer
D. None of these
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Ratio of the weight of H-atom to that of an electron is approximately______________?
A. 18.336
B. 1836
C. 18360
D. 183.6
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In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
A. Balmer series
B. Pfund series
C. Bracket series
D. Lymann series
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Excited atoms return to their ground state in_______________?
A. 10-10s
B. 10-8s
C. 10-6s
D. 10-9s
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Hydrogen atom does not emit X-rays because _________________?
A. Its energy levels are too close to each other
B. Its energy levels are too far apart
C. It is too small in size
D. It has a single electron
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Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
A. Zero
B. Focus
C. 2 f
D. F/2
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Least distance of distinct vision_____________?
A. Increases with increase in age
B. Decreases with increase in age
C. Neither increases nor decreases
D. Becomes infinite after 60 years
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Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________?
A. 0.5
B. 0.2
C. 1
D. 2
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A convex lens gives a virtual image only when the objects lies_________________?
A. Between principal focus and center of curvature
B. Beyond 2 f
C. At the principal focus
D. Between principal focus and optical center
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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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