On line practice quiz-1 for B. Sc. VI Semester Physics Students

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Shri Chhatrapati Shivaji College Omerga, Dept. Of Physics and Electronics, organised online practice quiz for students of B. Sc. VI Semester Physics paper No.XX ( Non-conventional Energy Sources and Optical fibre).

Email *

Name of Student *

Roll. No. *

Mobile. No. *

1. The main composition of biogas is

1 point

methane

carbon dioxide

hydrogen

nitrogen

Clear selection

2. Which of the following is a non-renewable resource?

1 point

forests

water

wildlife

coal

Clear selection

3. Horizontal axis and vertical axis are the types of:

1 point

wind mills

nuclear reactor

biogas reactor

solar cell

Clear selection

4. Tides in the sea are the result of-

1 point

universal gravitational effect of heavenly bodies like sun and moon on earth

heating and Cooling of the atmosphere

rotation of earth with respect to atmosphere

all of these

Clear selection

5. Which of the following organism produces biogas from cow dung slurry in the biogas plant?

1 point

aerobic bectria

anaerobic bectria

prolozoa

fungi

Clear selection

6. Wind is caused due to

1 point

uneven heating of earth’s surface

rotation of earth

local conditions

all of these

Clear selection

7. What are the disadvantage of solar energy

1 point

a large surface area is required collect the solar

daily average of solar energy varies from 4 to 7 kwh/m2

highly hazardous toxic material is used in the manufacturing of solar device.

all of the above.

Clear selection

8. Geothermal energy is

1 point

heat energy in the interior of earth

energy of molten mars exists in the farm of magma inside the earth.

molten lava on the surface of earth

energy obtained from solar thermal electric plants

Clear selection

9. Ocean thermal energy is due to

1 point

energy stored by waves in the ocean

temperature difference at different levels in the ocean

pressure difference at different levels in the ocean

tides arising out in the ocean

Clear selection

10. Mono-blade HAWT may be used for

1 point

water pumping

battery recharging

power supply system for remote area

All of these

Clear selection

11. Solar energy can be directly converted to electrical energy using-

1 point

Photovoltaic cell

Photoelectric cell

photodiode

LED Cell

Clear selection

12. Which element is used in solar cells?

1 point

Carbon

Silicon

Phosphorous

Sulphur

Clear selection

13. The region where the electrons and holes diffused across the junction is called ________

1 point

Depletion Junction

Depletion region

Depletion space

Depletion boundaryOption 1

Clear selection

14. A solar cell is a ___________

1 point

P-type semiconductor

N-type semiconductor

Intrinsic semiconductor

P-N Junction

Clear selection

15. During the collection of e-h pairs, holes are collected in

1 point

n-region

p-region

Si-wafer

Finger electrodes

Clear selection

16. What should be the band gap of the semiconductors to be used as solar cell materials?

1 point

0.5 eV

1 eV

1.5 eV

2.5 eV

Clear selection

17. In n-type semiconductor material majority charge carriers are---------

1 point

Holes

electrons

both holes and electrons

none of these

Clear selection

18. Active materials of a lead acid cell are

1 point

Spongy lead

Lead peroxide

Dilute H2SO4

All of the above

Clear selection

19. E.m.f of a fully charged lead acid cell--

1 point

2.1V

Clear selection

20. The storage battery generally used in electric power station is

1 point

Nickel-cadmium battery

Zinc carbon battery

Lead-acid battery

None of the above

Clear selection

21. What is the principle of fiber optical communication?

1 point

Frequency modulation

Population inversion

Total internal reflection

Doppler Effect

Clear selection

22. Calculate the numerical aperture of an optical fibre whose core and cladding are made of materials of refractive index 1.6 and 1.5 respectively.

1 point

0.55677

55.77

0.2458

0.647852

Clear selection

23. In the structure of fiber optic cable, the refractive index of core is always _______the refractive index of cladding.

1 point

Less than

Equal

Greater than

None of the above

Clear selection

24. The outer section of optical is

1 point

Core

Cladding

Sheath

optical fibre

Clear selection

25. The total internal reflection occurs when

1 point

A. light passes from denser medium to rarer medium

B. angle of incidence is greater than critical angle

both A and B

None of these

Clear selection

26. In step index fibre refractive index of cladding changes

1 point

abruptly

gradually

both abruptly and gradually

remains same

Clear selection

27. Choose the optical fibre material from the given materials.

1 point

Glass

Plastic

Silica

Quartz

Clear selection

28. Numerical aperture is expressed as the

1 point

NA = sin θo

NA = cos θo

NA = tan θo

NA = sec θo

Clear selection

29. The Characteristics of plastic fibres are

1 point

High light gathering capability

large core area

low cost components

all of these

Clear selection

30. Which fiber is useful for getting the maximum amount of power from a poor quality laser spot

1 point

Halide

HPSUV

SPSIR

Tapered

Clear selection

31. The transmission range of light in HPUSV fibre is-

1 point

180 to 800 nm

3 to 15 μm

100 to 200 nm

30 to 40 μm

Clear selection

32. Which of the following techniques are used for fabrication of optical fibre ?

1 point

external CVD

Internal CVD

Axial vapour deposition

All of these

Clear selection

33. For fabrication of optical fibre----process deposits the glass of required composition.

1 point

flame hydrolysis

flame oxidizes

heating

all of these

Clear selection

34. External Chemical vapour deposition process is suitable for

1 point

single mode fibre

step index single mode fibre

multimode fibre

graded index single mode fibre

Clear selection

35. Axial vapour deposition proces is suitable for fabrication of

1 point

step index fibre

graded index fibre

both step index and graded index

none of these

Clear selection

36. In internal chemical vapour deposition glass of the desired composition is deposited ------ glass tube.

1 point

inside

outside

both inside and outside

none of these

Clear selection

37. During fabrication of fibre, it is coated with a polymer to

1 point

give mechanical strength

protect from stress-corrosion

prevent it from being attacked by chemicals

all of these

Clear selection

38. The criteria for selecting the a strength member is---

1 point

Young's modulus

bulk modulus

modulus of rigidity

Poisson ratio

Clear selection

39. During fabrication of fibre, the bending radius is always

1 point

maximum

minimum

very large

none of these

Clear selection

40. For fabrication of fibre which of the factors are under consideration-

1 point

strength member

tensile loading

bending radius

all of these

Clear selection

41. Which of the following sources of energy are non-conventional ?

1 point

Biomass

Wind energy

geothermal energy

all of these

Clear selection

42. The main source of production of bio gas is

1 point

wood

wet-cow dung

crop

waste food

Clear selection

43. The periodic rise and fall of water level in sea is called as

1 point

water wave

water level

tides

sea level

Clear selection

44. Open cycle OTEC uses ________ surface water directly to make electricity.

1 point

Hot

warm

cool

icy

Clear selection

45. A machine which converts wind power into rotary mechanical power is called as

1 point

wind farm

wind mill

propeller

wind turbine

Clear selection

46. In what form solar energy is radiated from the sun?

1 point

Ultraviolet Radiation

Infrared radiation

Electromagnetic waves

Transverse waves

Clear selection

47. A semiconductor has generally ……………… valence electrons.

1 point

Clear selection

48. When a pentavalent impurity is added to a pure semiconductor, it becomes ………

1 point

An insulator

An intrinsic semiconductor

p-type semiconductor

n-type semiconductor

Clear selection

49. Solar cell is called as a constant ------ source.

1 point

Current

Voltage

resistance

power

Clear selection

50. In secondary battery chemical reactions are ----

1 point

Non-reversible

reversible

non- rechargeable

all of these

Clear selection

51. The main sections of optical fiber is----

1 point

core

cladding

sheath

all of these

Clear selection

52. The advantages of optical fiber is--

1 point

smaller size and large weight

protected from interference, impulse noise

no electrical connection

all of these

Clear selection

53. The transmission range of Halide fiber is---

1 point

180 nm to 800nm

500 nm to 2600nm

3 to 15μm

50 to 100 μm

Clear selection

54. Which of the following optical fiber has long range wavelength capability?

1 point

HPSUV

HPSIR

Halide

Tapered

Clear selection

55. Multimode step index fiber has

1 point

Large core diameter & large numerical aperture

Large core diameter and small numerical aperture

Small core diameter and large numerical aperture

Small core diameter & small numerical aperture

Clear selection

56. Which of the following material is used for changing refractive index with pure silica?

1 point

GeO2

B2O3

P2O5

All of these

Clear selection

57. Which of the following is not a technique for fabrication of glass fibers?

1 point

Vapor phase oxidation method

Direct melt method

Lave ring method

Chemical vapor deposition technique

Clear selection

58. Characteristics of internal chemical vapour deposition process of optical fiber is

1 point

It has dimensional restriction

Numerical aperture is 0.22

rate of deposition is 0.5gm per minute

all of these

Clear selection

59. which of the following material is used for outer jacket of optical fiber?

1 point

polyvinyl chloride

polyethylene

tetzel

all of these

Clear selection

60. Multichannel cable have the following forces

1 point

Torsion

flexure

tension

all of these

Clear selection

Submit

Clear form

Never submit passwords through Google Forms.

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms