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Posted By: krishna mohan Member Level: Gold Posted Date: 02 Jun 2008
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2005 Andhra Pradesh State Physics Question paper
2nd inter physics MARCH 2005 paper
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SECTION - A
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Note:
Answer all of the following
Each Qn carries 2 marks
All are very short answer type questions
Answer in one or two sentences only and in one place in proper order.
___________________________________________________
1. Define critical angle and mention its relationship with refractive index in optics.
2. What is the condition that explains the formation of bright and dark regions in the interference pattern in Young's double slit experiment? Explain its terms?
3. What are Franhofer lines and what is their importance?
4. Mention the uses of vibration magnetomerer?
5. Three capacitances 4 µF, 6µF, 8 µF are connected in parallel, what is the ratio of charges in them and what is the ratio of potential differences across them?
6. When is the series combination of cells advantageous and why?
7. What are Peltier and Thomson effects?
8. If a proton and an electron have same de-broglie wavelength, which has more momentum and kinetic energy?
9. What are the conditions necessary for a chain reaction to take place?
10. What are the charge carriers inside of p-n-p and n-p-n transistors?
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SECTION - B
-------------------------------------------------------------------------------------
Note:
Answer any SIX questions
Each question carries FOUR marks
All are short answer type questions
Limit your answer to 75 words only
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11. What are beats? How are they produced? Explain with two examples?
12. Draw the ray diagram for Ramsden eye produced? Explain with two examples.
13. Explain how plane polarized light is obtained by reflection?
14. How are the magnetic moments of two short bar magnets compared by equal distance method in Tan A position?
15. Four charges of equal magnitude 2 µC are kept at the four corners of a square of side 5 cm. Find the force experienced by any one of them?
16. Explain how a galvanometer can be converted into an ammeter and a voltmeter?
17. What are mass defect and binding energy? How are they related?
18. What is rectification? Explain the working of p-n junction diode as a full wave rectifier?
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SECTION C
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i) Answer any two questions.
ii) All are long answer type questions.
iii) Every correct answer carries eight marks.
iv) Every answer may be limited to 300 words.
19. Explain the formation of stationary waves in stretched strings and state the laws of transverse waves in stretched string.
A wire of length 1 m and mass 20 grams is stretched by a tension of 800N. Find its fundamental frequency
20. State and explain Kirchoff’s laws in electricity and apply them to derive whatstone bridge principle.
Four resistances P, Q, R, S of v alues 2?, 2?, 2? , and 3? are arranged to form a wheatstone bridge. Calculate the value of resistance to be connected in parallel to S so that the bridge is balanced.
21. Describe Thomson’s experiment to measure specific charge of an electron. Calculate the velocity of electrons accelerated by a potential difference of 104 V. The charge of the electron is 1.6x10 -19 C and mass is 9.11 x 10 -31 kg.
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