RGPV PH110 Practical MCQ | RGPV Physics Practical Objectives
MULTIPLE CHOICE QUESTIONS Engineering Physics (PH110)
1.
When the angle of the prism changes from
50 to 70 degree, then what happens to the minimum deviation?
A. Increased
by 20 degree
B.
No change
C.
Decrease
D.
Increase
2.
A ray of the light travels from medium
of refractive index N1 to a medium of refractive index N2 , if angle of
incidents is ‘i’ and angle of refraction is ‘r’ then sin(i)/sin(r) = ?
A. N1
B.
N2
C.
N21
D. N12
3.
Light travels __ in water than in air
A. faster
B.
slower
C.
at the same speed
D. perpendicular
to
4.
Gas inside sodium vapour lamp
A. Helium
B.
Mercury
C.
Neon
D. No
gas
5.
A point source produces__________.
A. Cylindrical
wavefront
B.
Spherical wavefront
C.
Plane wavefront
D. None
of these
6.
When the path difference between the two
light waves is integral multiples of wavelength, then the waves are said to be?
A. Out
of phase
B.
In phase
C.
Unaffected
D. Diffracted
7.
What is LASER?
A.
Light Amplification by
Stimulated Emission of Radiation
B.
Light Amplitude by Stimulated Emission
of Radiation
C.
Light Ampliication by Stimulation
Emission of Radiation
D. Light
Amplification and Stimulated Emission of Radiation
8.
Monochromatic light
means:
A.
light that
is only seen in black and white;
B.
light of all
colours;
C.
light of one colour only;
D. light that is outside the visible
spectrum.
9.
What is the use of collimator?
A. It
is used for focusing source light
B.
Use to get the parallel
rays
C.
Diverge the source light
D. Converge
the source light
10. Snell's
law can be written as:
A.
Sin(i)/Sin(r)=n2/n1
B.
Sin(i)/Sin(r)=n1/n2
C.
Sin(r)/Sin(i)=n2/n1
D. Sin(r)/Sin(i)=1/(n1*n2)
Ans A
11. How
does the refractive index changes with wave length ?
A. Increase
with increase in wave length
B.
Decrease with increase in
wave length
C.
Remains constant
D. Exponential
decrease
12. The
wave length of green light in mercury spectrum is
A.
546.1nm
B.
235.36nm
C.
400.12nm
D. 625.5nm
13. A
telescope's resolving power measures its ability to see
A. fainter
sources.
B.
more distnt sources.
C.
finer details in sources.
D. larger
sources.
14. What
process limits a telescope's resolving power?
A. Reflection
B.
Refraction
C.
Diffraction
D. Distraction
15.
The main advantage of a grating over
Young's apparatus is the
A. sharpness of the bright lines
B.
absence of dark fringes
C.
absence of bright fringes
D.
greater deviation of light
16.
A diffraction grating with a spacing
of 15,000 lines/in. has a slit separation of
A.
6.67 x 10-6 in.
B.
5.9 x 10-3 cm
C.
3.81 μm
D. 1.69 x 10-4 cm
17.
Which one of these wave behaviours
is not possible for longitudinal waves?
A.
Diffraction
B.
Reflection
C.
Refraction
D. Polarisation
18. A
simple harmonic motion is the one where the force is proportional to
A.
displacement
B.
velocity
C.
Mass
D. distance
19. Acompound
pendulum is
A. a
bar supported at two knife edges
B.
a rigid body capable of
oscillating in vertical plane
C.
a bar supported at four knife edges
D. a
bar supported at six knife edges
20.
Are the centre of suspension and
centre of oscillation in a Bar pendulum interchangeable?
A. yes
B.
no
C.
In some special case
D.
None of these
21.
The word photovoltaic comes from
words meaning:
A.
wind energy
B.
brightness
C.
light and electricity
D.
picture which moves
22.
Developing solar energy is important
because it:
A. does not produce pollution
B.
can be utilized in most regions of
the U.S.
C.
reduces our dependency on imported
energy
D.
all of the above
23. Electronic
distribution of a Si atom is
A.
2, 10, 2
B.
2, 8, 4
C.
2, 7, 5
D.
2, 4, 8.
24.
Semiconductor materials have ................. bonds.
A.
ionic
B.
covalent
C.
mutual
D.
metallic.
25. The process
of adding impurities to a pure semiconductor is called
A.
mixing
B.
doping
C.
diffusing
D.
refining.
26. The leakage
current of a P-N diode is caused by
A.
heat energy
B.
chemical energy
C.
barrier potential
D.
majority carriers.
27.
Any voltage that is connected across a P-N junction is
called ............. voltage.
A.
breakdown
B.
barrier
C.
bias
D.
reverse.
28. Principle behind
optical fibers?
A. Reflection
B.
Refraction
C.
Total internal reflection
D. Diffraction
29. Light is confined
within the core of a simple optical fiber by
A. refraction.
B.
total
internal reflection at the outer edge of the cladding.
C.
total internal reflection at the core cladding boundary.
D. reflection from the
fiber's plastic coating.
30. Which of the
following is not a reason to use fiber-optic cables for point to point data
transmission?
A. Need to assure data
security.
B.
Avoidance
of ground loops.
C.
Data-transfer rates too low to use metal cables.
D. Elimination of
spark hazards.
31. Which of the
following is NOT a reason to use flexible optical circuits?
A. Low loss
distribution.
B.
Protection
of fiber.
C.
Small size.
D. Compact and bend
easily.
32. The light sources
used in fibre optic communication are.
A. LEDs
B.
semiconductor
lasers
C.
Phototransistors
D.
both a and b
33. Acceptance angle
formula is
A. Sinq (N1-N2)
B.
Sin-1(Ö(N21-N22))
C.
Cos-1(Ö(N21-N22))
D. None of these
34. Numerical aperture
formula is:
A.
(Ö(N21-N22)/N0)
B.
(N21-N22)
C.
Sin-1(Ö(N21-N22))
D. None of these
35. The experiment
which directly determines both the sign and density of charge carriers in a
sample material is.
A. Four probe method
B.
Hall Experiment
C.
Quincke's method
D. None of these
36. If a current
carrying conductor placed in a perpendicular magnetic field, a potential
difference will generate in the conductor which is perpendicular to both
magnetic field and current. This phenomenon is called
A. Peltier effect
B.
Joule
effect
C.
Thomson
effect
D.
Hall effect
37. The quantity 1/(ne)
where 'n' is the number density of charge carriers and 'e' is the electric
charge represents.
A. Thomson effect
B.
Joule
effect
C.
Hall coefficient
D. Peltier effect
38. Negative Hall
coefficient indicates that the charge carriers are.
A. Holes
B.
Electrons
C.
Both
holes and electrons
D. None of the above
39.
Wave nature of light is evidenced by
A.
Photo-electric effect
B.
Interference
C.
black body radiation
D.
Nuclear emission
40.
In Netwon’s rings, interference is
due to light rays reflected from
A.
lower surface of lens
and upper surface of glass plate.
B.
lower surface of glass plate and
upper surface of lens.
C.
lower surface of lens and lower
surface of glass plate.
D.
upper surface of lens and upper
surface of glass plate.
41. Newton
ring Experiments works under the principle of
A. Diffraction
of light.
B.
Polaristion of light.
C.
Interference of light.
D. None
of the above
42.
In reflected light the central
fringe of Newton’s ring is
A.
dark
B.
non-uniform
C.
bright
D.
none of them
43.
In Newton’s ring experiment
properties can be measured.
A.
Wavelength of light
B.
Thickness of the film
C.
Refractive index of liquid
D.
All the above
44.
The spacing between the Newton’s
ring ______ with the increase of the order of the ring.
A.
Increases
B.
Decreases
C.
Remains same
D.
None of these
45.
Light waves are
A.
longitudinal waves
B.
transverse waves
C.
both A and B
D.
none of them
46.
Maximum number of orders available
with a grating is
A.
directly proportional to the
wavelength
B.
inversely proportional to the
grating element
C.
independent of grating element
D.
directly proportional
to the grating element.
47.
In a single slit experiment if the
slit width is reduced
A.
the fringes becomes brighter
B.
the fringes becomes
narrower
C.
the fringes becomes wider
D.
the colour of the fringes change
48.
The condition of minima for grating
A.
N (a + b) sin θ = mλ
B.
(a + b) sin θ = mλ
C.
(a + b) sin θ = m N λ
D.
N (a + b) cos θ = m λ
49.
In Fraunhofer diffraction, the
diffracted wavefront is
A.
Plane
B.
Spherical
C.
Cylindrical
D.
None of these
50.
When white light is incident on a
diffraction grating, the light diffracted more will be
A.
blue
B.
yellow
C.
violet
D.
red
ANSWERS
1.
D 2.
C 3.
B 4.
C 5.
B 6.
B 7.
A 8.
C 9.
B 10.
A
11.
B 12.
A 13.
C 14.
C 15.
A 16.
D 17.
D 18.
A 19.
B 20.
A
21.
C 22.
A 23.
B 24.
B 25.
B 26.
A 27.
C 28.
C 29.
C 30.
C
31.
C 32.
D 33.
B 34.
A 35.
B 36.
D 37.
C 38.
B 39.
B 40.
A
41.
C 42.
A 43.
D 44.
B 45.
B 46.
D 47.
B 48.
A 49.
A 50.
D
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very good question for online practical exam.
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