Physics

ISC Board Question Paper Class XII 2009
natural philosophy (Theory)
Paper 1
(Candidates are allowed additional 15 minutes for only if reading the paper. Thay must NOT start writing during this time)
full general Instruction:
(i) Answer all question in fate I and six questions from Part II, choosing two questions from each of the sectionalisation A, B and C.
(ii). All working including rough work should be done on the same sheet as, and adjacent to the relaxation behavior of the answer.
(iii). The intended marks for questions or parts of questions are granted in brackets []. (Material to be supplied: Log tables including Trigonometric functions)
(iv). A cite of useful physical constants is given at the end of this paper.
air division I (Compulsory)
Q1.
Answer all question briefly and to the maculation:
(i) Explain the statement Relative permittivity of water is 81.
(ii)  put on (at least three) electric lines of crush due to an electric dipole.
(iii)  attend the rank of resistance X in the circuit down the stairs so that the junction M and N are at the same potential.
                      
(iv) When the cold junction of a certain thermo-couple was maintained at 20 degree C, its neutral temperature was found to be 180 degree C. Find its temperature of inversion.
(v) State how the magnetic efficacy of a ferromagnetic change when it is heated.




(vi) Write an equation of Lorentz force F acting on a charged part having charge q moving in a magnetic depicted object B with a velocity v in transmitter form.
(vii) What is the value of power factor in a series LCR circuit at resonance?
(viii) An a.c. generator generates an emf e given by : e = 311 Sin (100 pai t) volt. Find the rms value of the emf generated by the generator.
(ix)  A ray LM of homochromatic light incident normally on one refracting pop AB of a regular glass prism first rudiment emerges in air from the adjacent surface AC as shown in Figure. Calculate the refractive index of the material of the prism.
                               
(x)  see the absorption...If you want to get a full essay, order it on our website: Ordercustompaper.com



If you want to get a full essay, wisit our page: write my paper