SECTION – A
Note: a) Answer all questions.
b) Every question carries 2 marks.
c) All are very short answer type questions. 10 x 2 = 20
1. If slits in Young’s double slit experiment are illuminated with
white light which coloured fringe will be closer to the central
maxima?
2. Light is reflected from a lead glass plate with index of refraction
1.96. At what angle of incidence must light strike the plate so that the reflected ray is completely plane polarized?
3. What do you mean by Curie temperature?
4. Write Gauss’s law in electrostatics.
5. State Faraday’s and Lenz’s laws in Electro magnetics.
6. A transformer converts 100 V ac into 1000V a.c and has 10 turns in its primary. What is the number of turnings in secondary.
7. State Moseley’s law and its importance.
8. How does the width of the depletion layer change in a p-n junction diode i) When it is forward-biased ii) and when reverse biased?
9. Write the truth table for NAND gate. How does it differ from AND gate?
10. What do you mean by modulation?
SECTION – B
Note: a) Answer any Six questions.
b) Every question carries 4 marks.
c) All are short answer type questions. 6 x 4 = 24
11. Explain the working of simple microscope and derive an expression for its magnifying power.
12. Derive an expression for magnetic induction at a point on the
equatorial line of a bar magnet.
13. Two positive charges q1 = 4×10-6 C and q2 = 9×10-6 C are placed at 10 cm apart mutually, in air. Find the position of a third charge placed between them such that resultant force is zero on it.
14. A battery of emf 6 V and internal resistance 1Ω gives potential
difference of 5.8 V when connected to an external resistance. Find the external resistance.
15. Explain the principle of Potentio meter.
16. Using a graph explain how thermo emf changes with temperature hence state neutral and inverse temperatures.
17. What do you mean by photo electric effect? Explain it using
Einstein’s equation.
18. What is a Zener diode? How it is possible to use it as a Voltage regulator.
SECTION – C
Note: a) Answer any two questions.
b) Each question carries 8 marks.
c) All are long answer type questions. 2 x 8 = 16
19. What is Doppler effect? Find an expression for the apparent frequency heard when the source is in motion and the listner
is at rest. What is the limitation of Doppler effect?
A train is travelling at 120 Kmph and blows a whistle of frequency
1000 Hz. What is the apparent frequency as heard by the stationary observer if the train approaching him?
20. Obtain an expression for torque on a current carrying loop placed in a uniform magnetic field. Describe the construction and working of moving coil galvanometer.
21. Define mass defect and binding energy of a nucleus. Draw the model graph showing relation between average binding energy and mass number and explain its characteristics.
Senior Inter Physics Paper 2
AP Senior Intermediate Physics Model Paper 2
Following is the Senior Intermediate Physics Model Paper 2 for the benefit of Inter students of Andhra Pradesh. The question paper is in English Version. Duration is 3 hours and maximum marks are 60.
SECTION – A 10 × 2 = 20M
Note: i) Answer all the questions.
ii) Every correct answer carries 2 marks.
iii) All are very short answer type questions.
1. The head lights of a distant car do not produce interference pattern. Why?
2. How does the spacing between fringes in Young’s double slit experiment change if (a) the slit separation is increased and b) the colour of light is changed from red to blue.
3. Two magnetic poles of strength 40 Am and 10 Am are separated by a distance of 20 cm in air. Find the force between them.
4. Define Electron Volt and name the physical quantity for which it is a unit.
5. What is shunt resistance? Mention its use.
6. What type of transformer is used in a bed lamp? What is the phenomenon involved in the working of a transformer?
7. What is Mosley’s Law? What is its importance?
8. A radio active sample contains ‘n’ atoms. Find the number of atoms undecayed after five half lives.
9. State two uses of Radio Isotopes.
10. Define modulation. Why is it necessary?
SECTION – B (6 × 4 = 24 M)
Note: i) Answer any six of the following questions.
ii) Each question carries 4 marks. iii) All are short answer type questions.
11. Describe the construction and working of an Optical Fibre. State its two uses.
12. Derive an expression for the couple acting on a bar magnet placed in a uniform magnetic induction field.
13. Define intensity of electric field →E and potential difference V. Derive the relationship between them.
14. Describe an experiment for the determination of unknown resistance of a wire with meter bridge.
15. Applying the Kirchhoff’s laws to Wheatstones Bridge and derive the condition of a Wheatstone Bridge.
16. Write a short notes on the working of a theremopile.
17. State the laws of Photoelectric effect.
18. Distinguish between Nuclear Fission and Nuclear Fusion.
SECTION – C (2 X 8 =16 M)
Note: i) Answer any two of the following questions.
ii) Every question carries 8 marks.
iii) All are long answer type questions.
19. Explain the formation of stationary waves in stretched strings and hence deduce the laws of transverse waves in stretched strings. A wire length of 1 m and mass 20 g is stretched with a force of 800 N. Find its fundamental frequency.
20. Describe a tangent galvanometer with its necessary theory. Compare it with a moving coil galvanometer.
21. What is rectification? Explain the working of a full wave rectifier with a neat diagram. How it is advantageous over a half-wave rectifier?