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1.Derive an expression for electric field due to an electric dipole in an axial line.

2. State Joule’s law. Explain the verification of Joule’s law by using Joule’s calorimeter.

3. Explain the method of producing induced emf by changing the orientation of the coil with respect to the magnetic field.

4. Explain the time dilation

b) The time interval is measured by an observer at rest is 2.5×10^{-8} s. If the observer moving at a speed v=0.73c, then the time interval measured by him is?

5. Explain the principle, construction and working of Geiger-Muller counter.

6. Explain the applications of radio isotopes.

7. Explain Raman effect.

8. What is rectification? Explain the bridge rectifier

9. What is operational amplifier? Explain how the OP-Amp working as a difference amplifier?

10. Explain the analysis of amplitude modulated wave

11. What is rectification? Explain the bridge rectifier

12. a)State and prove the radioactive disintegration law as N=N_{o}e -λt

b) Show that the mass of radium almost a gram of having the activity of 1 curie. Given half life of radium is 1600 years. 1 curie is 3.7×10^{10} dis./sec.

13. Write the laws of photoelectric emission

14. Calculate the de-Broglie wavelength of electron having kinetic energy 120e V

15. Define drift velocity. Obtain the relationship between the current and drift velocity.

16. 4A current passes through a tangent galvanometer having 5 turns and 30cm diameter. The earth’s horizontal magnetic induction is 4×10^{-4}T, find the deflection produced

17. Explain the AC circuit with pure resistor. Obtain the phase relationship

18. Write the properties of canal rays.

19. Draw the block diagram of Amplitude modulated transmitter.

20. What are the applications of CRO?

21. State De-Morgan’s theorems.

22. What is nuclear fission? Give example

23. If the radioactive sample is decays 50% in 5 days, after 20 days how much of sample will left over?

24. According to Bohr’s hypothesis calculate the de-Broglie wavelength of electron in n=1 in hydrogen atom. Compare the wavelength to its circumference of circular orbit.

25. What is stopping potential?

26. Prove (A+AB) = A by i) Boolean algebra method ii) truth table method.

27. Give the uses of CRO.

28. The electron beam enters the two fields are acting perpendicular to each other, the electric field is 3.4×10^{4} V/m and the magnetic field 2×10^{-3}T, if the path is does not deviate calculate its velocity.

29. The resting frequency of FM signal is 105 MHz, the maximum frequency is 105.03 MHz, when its modulated calculate

i) frequency deviation

ii) carrier swing

30. What is binding energy?

31. Calculate the time required to decay of small amount of radon as 60%. Half life of radon is 3.8 days

32. Draw the energy level diagram of N-type and P-type semiconductors

33. Give a short note on baryons

34.Explain the function of OR gate using diode with truth table.

35. Distinguish the hard and soft x-rays.

36. What is photoelectric effect?

37. . Give the postulates of special theory of relativity.

38. What is stopping potential?

39. What is eddy current? How will you reduce the eddy current?

40. What are matter waves?

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