1: You must write question paper series in the circle at top left side of title page of your answer sheet.
2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.
3: Don't leave blank pages/pages in your answer book.
4: All questions are compulsory.
5: Internal choices are given in some questions.
6: Use log table if necessary.
7: Answer should be brief and to the point.
8: Question no 1-8 are MCQ carrying 1 Mark each. Question no 9-16 are short answer type carrying 2 Mark each. Question no 17-24 are short answer type questions carrying 3 marks each and question no 25-27 are long answer type carrying 4 marks each.
Q11: Calculate the value of Resistance needed to convert a galvanometer of resistance 200 ohm which gives full scale deflection for a current of 5 mA into voltmeter of range 25 volt
Q12: what are polaroids? give their applications.
Q13: what is difference between P type and n type semiconductor?
Q14: what is electromagnetic spectrum? give two uses of infrared rays.
OR
What are microwaves? give their one use.
Q15: why the colour of sky is blue?
Q16: why AC is more dangerous than DC ?explain.
Q17: what is the principle of potentiometer?how it is used to compare the EMF of two cell.
OR
find the effective EMF of the cells which are connected in series.
Q18: drive an expression for magnetic field on the axis of current carrying coil of radius 'a' at a distance 'x' from the centre of coil.
Q19: what is mass defect, binding energy and binding energy per nucleon?
Q20: find the maximum distance covered by TV – transmitting antenna of height h. what is skip zone?
Q21: what is rectification? how can a diode be used as half rectifier?
Q22: verify law of Photoelectric effect after driving Einstein's Photoelectric equation.
OR
Drive and expression for de Broglie wavelength of an electron moving under potential difference of V volts
Q23 using Hygen's principle Prove the law of reflection.
Q24: This question is diagrammatic. Please see from photos.
Q25: state and prove Gauss Theorem. deduce Coulomb's law using Gauss Theorem.
Q26: Derive an expression for average power in LCR series circuit connected to AC supply Hence define power factor
Q27: state new cartesian sign convention drive an expression
–n1/U + n2/V = n2 – n1 /R
when refraction occurs from denser medium at convex spherical refracting surface
OR
what is meant by Dispersion of light. Prove that for a prism
u= sin (A+∆m/r) /sin A/r where symbols have their usual meanings
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