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| ALL Past Questions TOPIC WISE For The Last 10-12 years |
| Diffraction of light |
1. |
In a single slit diffraction pattern how does the angular width of central
maximum change,when |
Marks [2] |
i |
The slit width is increased. |
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ii |
Light of smaller wavelength is used. |
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Choice in 2005 |
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2. |
Fraunhoffer diffraction from a single slit of width 1.24 x 10–6 m is observed with light of wavelength 6200Å. Calculate the angular width of the central maximum. |
Marks [1] |
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Compulsory in 2005 |
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3. |
Light of wavelength 600 nm falls normally on a slit of width 1.2 µm protecting Fraunhofer diffraction pattern on a screen. Calculate the angular position of the first minimum and the angular width of the central maximum. |
Marks [4] |
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Choice in 2002 |
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4. |
Obtain the relation, a sin q = l for the first minimum of the diffraction pattern of a single slit of width a using light of wavelength. |
Marks [3] |
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Choice in 2001 |
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5. |
Fraunhoffer diffraction from a single slit of width 1.0 mm is observed with light of wavelength 500 nm. Calculate the half angular width of the central maximum. |
Marks [2] |
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Choice in 2002 |
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6. |
Light of wavelength 5900 x 10-10 m falls normally on a slit of width 11.8 x 10-5 cm, and the resulting Fraunhoffer diffraction is received on a screen. Calculate the angular position of the first minimum. Also find the angular width of the central maximum. |
Marks [4] |
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Choice in 1997 |
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7. |
Explain why light waves can be polarised but sound waves cannot. Describe a method by which a plane polarised light can be obtained. |
Marks [3] |
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Choice in 2005 |
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8. |
Light is incident on a block of glass at the polarizing angle. How does this polarising angle vary with the wavelength of light? |
Marks [1] |
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Compulsory in 2005 |
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9. |
The refractive index of glass with respect to air is 3/2. Find the angle of polarisation. |
Marks [1] |
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Compulsory in 2004 |
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10. |
Green light is incident at the polarizing angle on a certain glass plate. The angle of refraction is 32º. What are: |
Marks [3] |
i |
The polarizing angle |
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ii |
The index of refraction of glass |
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Also copy the diagram shown here and indicate the polarization components (of electric field on the reflected ray and on the refracted ray, by double arrows and/or dots.) |
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Choice in 2003 |
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| Topics Covered |
1. |
Electrostatics |
7. |
Ray Optics |
a |
Coulomb's Law And Gauss Theorem |
a |
Speed Of Light |
b |
Electric Potential And Potential Energy |
b |
Photometry |
c |
Capacitance |
c |
Refraction At A Plane Surface |
2. |
Current Electricity |
d |
Refraction At A Curved Surface, Lenses |
a |
Ohm's Law And Current Density |
e |
Refraction Through Prism |
b |
Electrical Resistance |
f |
Dispersion Of Light |
c |
Electric Cell |
g |
Lens Aberration And Dispersive Power |
d |
Heating Effect Of Current |
h |
Telescopes And Microscopes |
e |
Thermo Electricity |
8. |
Electrons And Protons |
f |
Kirchoff's Laws And Its Applications |
a |
Cathode Rays Wave Particle Duality |
3. |
Magnetism |
b |
Photoelectric Effect |
a |
Magnetic Field, Super Position Of Magnetic Fields And Magnetometers
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9. |
Atoms |
b |
Magnetic Properties Of Materials |
a |
Bohr's Theory Of Hydrogen Atom |
4. |
Electromagnetism |
b |
X-Rays |
a |
Biot Savart Law And Its Applications |
10. |
Nucleus And Nuclear Energy |
b |
Force On Current Carrying Conductor And Moving Charge In A Magnetic Field Galvanometer |
a |
Composition Of Nucleus And Binding Energy |
c |
Electromagnetic Induction Generators (AC And DC) |
b |
Radioactivity |
5. |
Alternating Current Circuits Transformer |
c |
Nuclear Energy |
a |
Alternating Current Circuits Transformer |
11. |
Semi Conductor Devices |
6. |
Wave Optics |
a |
Energy Bands In Solid Semi – Conductors |
a |
Electromagnetic Waves And Space Communication |
b |
Junction Diodes And Their Use |
b |
Huygen's Principle And Its Applications |
c |
Junction Transistor And Their Use |
c |
Interference Of Light |
d |
Logic Gates |
d |
Diffracton Of Light |
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e |
Polarisation Of Light |
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| Advantages |
1. |
Topicwise Presentation Of All Past Questions Allows Topicwise Revision. Past Questions Are The Most Important Questions You Must Solve First. |
2. |
Frequency analysis shows types of past questions with marks, year reference and
whether choice or compulsory, short or long. |
3. |
Eliminates questions on topics not part of a forthcoming Board Exam. |
4. |
Adds model questions for new topics in a forthcoming Board Exam. |
5. |
Data is presented from the most recent to earlier years, covering 10-12 years. |
6. |
Perfect for making strategy and for the prioritization of study objectives. |
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| Solutions To All Past Questions |
| Topic 6 : Wave Optics
Sub Topic4: Diffraction Of Light |
Question |
Solution |
Formulae/Concepts Used |
Tips |
| Draw a graph showing variation of intensity on the screen of a single slit Fraunhoffer diffraction experiment against angle of diffraction, when the slit is illuminated by monochromatic light of wave length 'l‘. If the slit width is 'a' at what diffraction angle is the first minimum obtained. (No derivation is required). |
Mark [4]
Choicein 1999 |
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| Advantages Solutions To All Past Questions |
• |
They Allow Self Check. |
• |
They Guide As To How And How Much To Write In The Board Exam. |
• |
Learn Backwards From Answers. |
• |
Learn How To Answer In A Board Exam. |
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Tips And Formulae To Memorize. |
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Last Minute Help: Gain Marks Even While You Sit And Read In Bed! |
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| Revision Notes |
• |
Revision Notes On What Has Already
Come In The Last 10-12 Years Are Helpful
Throughout The Year, Just Before Examinations,
Or Even The Night Before Exam. They Provide
A Quick Synopsis Of Solutions And Tips On Each Topic. |
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| Topic: Electrostatic Sub topic II:Electric Potential and Electric Potential Energy |
Topic
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No. of Questions
(in the last 11 year papers)
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Questions with Solutions |
| Wave Optics |
| Sub topic I: Electromagnetic Waves and Space Communications |
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| 12 Questions |
| Marks of these questions range from 1 to 4. These questions have come both in the compulsory and choice section. |
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| 2005, 2004 (two questions), 2003 (two questions), 2002, 2001, 2000, 2000 (solved), 1999, 1997 and 1995. |
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| Question (2000), 2 marks, choice |
| Draw a sketch of electromagnetic spectrum showing relative positions of ultraviolet, infrared, x-rays and microwaves with respect to visible light. State approximate wave length of any two. |
| Solutions |
| A complete chart of electromagnetic radiations in order of their frequencies or wavelengths is called electromagnetic spectrum. |
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Guidelines/Formulae |
Tips |
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1. All electromagnetic waves travel with the same speed (as the speed of light).
2. Idea of the entire chart of electro - magnetic radiation.
3. Order of wavelengths of different e.m. waves. |
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| 1. Memorise the order of different regions of e.m. waves in the spectrum. |
| 2. Striking features / properties of different e.m. waves must be learnt. For example, infrared rays when absorbed causes heating effect. |
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Tick:How Do You Find
This Topic? |
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| Advantages |
• |
No Need To Make Separate Extensive Revision Notes. |
• |
Especially Excellent For Last Minute Revision. |
• |
Use Your Short-Term Memory To Boost Results By Reviewing These Notes The Night Before Exam, When Your Mind Is The Keenest! |
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| Prioritize Using
Smart Study Plan Interpretation |
• |
On Topic 6 - Wave Optics Sub topic 1 - Electromagnetic
Waves and Space Communications, there have been
fifteen past questions in the last 13 years. |
• |
They came in the years 2007, 2006, 2005, 2004, 2003, 2002, 2001,
2000, 1997 and 1995. |
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Whether they were Compulsory or Choice questions
is indicated by C or NC. |
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For example, the 2007 question was worth three marks
and was Not Compulsory. |
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Suggested time to attempt all these 15 questions on your own is 75 minutes |
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| Frequency Analysis And Planning Chart |
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| Advantages |
• |
Find Out Which Past Questions Were Difficult For You
By Filling Out Each Circle According
To How Difficult You Found A Question. |
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Study According To Your Personal Strengths. |
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Save Time By Planning Better. |
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Revise These Questions For A Second Time To Maximize Marks. |
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Have A Thorough Knowledge Of What Has Already Come In The Last
13 Years On Each Topic. |
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| Remember |
Going Over Past Questions Gives You More
Confidence. Solutions To Every Past Question
As Per Board Guidelines Ensure
You Gain Every Possible Mark. |
These Are The Most
Important Hours
You Will Spend Towards Preparation Of
Your Board Exam. |
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| Extras |
• |
How To Work Smart: 10 Keys To Success By Dr Sunita Gandhi. |
• |
Nutritional Guidelines By Dr Amitabh Pandit, A Well Known Naturopath. |
• |
Cd–Includes Ten Keys Of Dr Gandhi As Explained By The Students Of
City Montessori School (Cms), Lucknow, Up And Testimonies
of Students Who Have Used The Sure Success Series. |
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| Please Note |
• |
Questions And Topics Not Relevant To A Future Board Exam Are
Not Included. |
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New Model Questions Are Added Whenever A New Topic Has Been
Included By The Council For A Forthcoming Board Exam. |
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