1 .In the human eye, the focussin is done by
A.  to and fro movement of the eye lens
B.  to and from movement of the retine
C.  chang in the convexity of the eye lens
D.  Change in the refractive index of the eye fluids.
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2 .The sounds having frequency of 20 Hz to 20, 000 Hz are
A.  Ultrasound
B.  Infrasonic
C.  Hydpersonic
D.  Audible sounds
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3 .Melting point of rice
A.  increases with increase of pressure
B.  decreases with increase of pressure
C.  is independent of pressure
D.  none of these
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4 .A passenger in moving train tosses a coin upward which falls behind him. It implies that the motion of the train is-
A.  accelerated
B.  along the circular tracks
C.  retarded
D.  uniform
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5 .Global warming is expected to result in-
A.  Increase in level of sea
B.  Change in crop pattern
C.  Change in coastline
D.  Each of the above
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6 .The lowest temperature is recorded by
A.  Mercurial thermometer
B.  Minimum reading thermometer
C.  Alcohol thermometer
D.  Maximum reading thermometer
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7 .A population that is growing exponentially in the absence of limiting factors can be illustrated by a (n)…..
A.  S-shaped curve
B.  J- shaped curve
C.  Curve that terminated in a plateau phase
D.  Tolerance curve
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8 .The sun is a
A.  Producer of water
B.  Secondary source of energy
C.  Primary producer of energy
D.  Teritiary Producer of energy
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9 .Alternating current can be measured by
A.  Moving coil galvanomenter
B.  Hot wire ammeter
C.  Tangent galvanometer
D.  None of these
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10 .Chernobyl Nuclear Plant, now decommissioned is in
A.  Russia
B.  Ukrain
C.  Belarus
D.  Georgia
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11 .When a body is earth conncected, electrons from the earth flow into the body. This means the body is
A.  charged negatively
B.  an insulator
C.  uncharged
D.  charged positively
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12 .Farraday's law of electromagnetic induction is related to the
A.  law of conservation of charge
B.  law of conservation of energy
C.  third law of motion
D.  none of these
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13 .Beats occure because of
A.  Interference
B.  reflection
C.  refraction
D.  Doppler effect
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14 .The loudness of sound depends upon
A.  velocity
B.  pitch
C.  amplitude
D.  wavelength
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15 .The audible requency range of human ear is
A.  20 hertz to 200 hertz
B.  2 hertz to 20 hertz
C.  200 hertz to 2000 hertz
D.  20 hertz to 20000 hertz
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