General Science Physics Questions for SSC / UPSC Set 8

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General Science Physics Questions for SSC / UPSC MCQs Set 8 Questions And Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Online free practice Quiz  – General Studies

1 .The image formed on the retine of a human eye is
A.  virtual and inverted
B.  virtual and erect
C.  real and erect
D.  real and inverted
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2 .In a healthy human eye, the focusing is done by the
A.  To and from movement of the eye lens
B.  Changing curvature of the retina
C.  Change in the convexity of the lens throught ciliary muscles
D.  Change in the refractive index of the eye fluid
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3 .Different objects at different distances are seen by the eye. The paramenter athe remains. Constent is
A.  the focal length of the eye lens
B.  the object distance from the eye lens
C.  the radii of curvature of the eye lens
D.  the image distance from the eye lens
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4 .The mercury and sodium street lamps light up because of.
A.  Electron absorption
B.  Electron emission
C.  Atomic emission
D.  Atomic absorption
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5 .Why is red light employed for danger signals?
A.  red colour is sooting to the eye
B.  human eye is most sensitive to red colour
C.  red light is scattered least
D.  red light is scattered most
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6 .A ray of white light strikes the surface of an object. If all the colours are reflected the surface would appear:
A.  Black
B.  White
C.  Grey
D.  Opaque
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7 .In optical instrument, the lenses are used to form image by the phenomenon of -
A.  reflection
B.  refraction
C.  scattering
D.  diffusion
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8 .A water tank appears shallower when it is viewed from top due to
A.  Rectilinear propagation of light
B.  Reflection
C.  Total internal reflection
D.  Refraction
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9 .The primary colours in phothgraphy are
A.  red, blue, yellow
B.  red, yellow, green
C.  red, blue, green
D.  red, green, cyan
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10 .The head mirror used by E.N.T. doctors is
A.  Cancave
B.  convesx
C.  plane
D.  planoconvex
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11 .Radar is used to
A.  locate submerged submarines
B.  receive signal from radio receivers
C.  detect and locate distant objects
D.  locate geostationary satellites
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12 .The colours of starts depends on their
A.  temperature
B.  distance
C.  radius
D.  atmospheric pressure
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13 .Rainbow is formed due to
A.  refraction and dispersin
B.  scattering and refraction
C.  diffreaction and refraction
D.  refraction and reflection
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14 .Light from the sun reaches upon in nearly
A.  8 min.
B.  2 min.
C.  6 min.
D.  4 min.
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15 .Total internal reflection cannot take place when light goes from:
A.  water to glass
B.  water to air
C.  glass to air
D.  glass to water
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