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Long Answer Type Question
Q. 1. State Huygen’s principle. What steps are involved in constructing a wave front ?
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Q. 2. Prove Snell’s law using Huygen’s Principle .
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Q. 3. Prove that the distance β between the successive bright and dark fringes formed in Young’s experiment is β = Dλ/d where latters usual meaning .
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Q. 4. Explain polarisation of light. Define plane of polarisation and plane of vibration.
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Q. 5. What is Brewster’s law ? What will be the refractive index of a transport medium with a polarising angle of 60° ?
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Q. 6. What is diffraction of light ? How does it differ from interference of light ?
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Related CBSE Information
Short Answer Type Questions
Q. 1. Name the nine plantes.
Answer
Q. 2. What is 1 AU ?
Answer
Q. 3. How were the crators caused on the surface of moon ?
Answer
Q. 4. What is albedo of a planet ?
Answer
Q. 5. State Hubble's law.
Answer
Q. 6. What is order of mass of Sun ?
Answer
Q. 7. What is Milky Way ?
Answer
Q. 8. How is brightness of star represented ?
Answer
Q. 9. What is the value of Solar Constant ?
Answer
Q. 10.
Short/V. Short Questions i.e. 1-2 Marks Questions
1. Name two basic properties of electric charge.
Answer :
2. The electric potential at 0 - 9 m from a point charge is + 50 V. Find the magnitude and nature of the charge.
Answer :
3. Small ozone layer on the top of atmosphere is crucial for human survival. Why ?
Answer :
4. Sketch lines of force due to point charges (i) q < 0 ; (ii) q > 0.
Answer :
5. Define dielectric constant in terms of capacitance of a
Very Short Answer Type Questions
Q. 1. Define semiconductor.
Answer
Q. 2. What is doping ?
Answer
Q. 3. Doping of silicon with indium leads to which type of semiconductor ?
Answer
Q. 4. What is n-type semiconductor ?
Answer
Q. 5. What is p-type semiconductor ?
Answer
Q. 6. Define Gate.
Answer
Q. 7. Which of crystalline or amporphous substance isotropic ?
Answer
Q. 8. Why transistor is so called 7
Answer
Q. 9. What (11011)2 stand for?
Answer
Q. 10. How can you test in
Very Short Answer Type Questions
Q. 1. Define isotopes.
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Q. 2. Define isobars.
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Q. 3. What is atomic mass unit ?
strong>Answer
Q. 4. Define nuclear fission and fusion.
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Q. 5. Define Curie.
strong>Answer
Q. 6. Define half life period.
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Q. 7. What is approximately density of nucleus ?
strong>Answer
Q. 8. What is the ratio of gravitational, electric and nuclear interaction ?
strong>Answer
Q. 9. What is mass defect ?
strong>Answer
Q. 10. Deine radioactive decay constant.
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Q. 11. What is the relation between nuclear
Short/V. Short Answer Questions (1,2 Marks Questions)
1. Name the two factors which account for existence of atmosphere on the planet.
Answer
2. How is the luminosity of a star affected by the increase in its mass ?
Answer
3. Name the parameters which determine the apparent colour of a star.
Answer
4. What is geostationary satellite ?
Answer
5. What are meteorites ?
Answer
6. How does a radar help in determining the distance of a distant object ?
Answer
7- Write the sequence of steller spectra which arranges the states in order of decreasing tempera¬ture.