28. A wave that travels through a
stretched strings is known as
A.
electromagnetic wave
B. micro wave
C. mechanical wave
D. seismic wave
Answer
29. A transverse wave and
longitudinal wave travelling in the same direction in a medium differ
essentially in their
A. frequency
B. amplitude
C. direction of vibration of the particles of the medium
D. period of
vibration of the particles of the medium
Answer
30.What is the velocity of sound at
1000C if the velocity of sound at 00C is 340m/s?
A. 497m/s
B. 440m/s
C. 397m/s
D. 240m/s
Answer
31.If a sonometer has a fundamental frequency
of 450Hz, what is the frequency of the fifth overtone?
A. 2700Hz
B. 3700Hz
C. 1700Hz
D. 2250Hz
Answer
32. A man 1.5m tall is standing 3m in
front of a pinhole camera whose distance between the hole and the screen is
0.1m. What is the height of the image of the man on the screen?
A. 0.05m
B. 0.15m
C. 0.30m
D. 1.00m
Answer
33. A ray of light passing through
the center of curvature of a concave mirror is reflected by the mirror at
A. 00
B. 450
C. 900
D. 1800
Answer
34. From the diagram below, calculate
the incident angle.
A.410
B. 490
C. 550
D. 610
Answer
35. Total internal reflection will
not occur when light travels from.
A.
water to air
B. water into glass
C. glass into air
D. glass into water
Answer
36. What does the diagram below
represent?
A. telescope in normal use
B. microscope in normal use
C. telescope in
abnormal use
D. microscope in abnormal use
Answer
37. If the linear magnification of
the objective and eyepiece convex lenses of a compound microscope are 4 and 7
respectively, calculate the angular magnification of the microscope.
A. 2
B. 3
C. 11
D. 28
Answer
38. The angle of deviation of light
of various colours passing through a triangular prism increases in the order
A.
red – green- blue
B. green- violet - blue
C. blue-red-green
D. blue-green-red
Answer
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