HOUSE EXAMINATIONS +2 PHYSICS TIME : 3 HRSM.M : 70 Q. NOS. 1-5 ar OF 1 MARK EACH 1. State Gausss theorem in electrostatics. 2. Name the units of conductance and conductivity. 3. What is the dimension of speed of X-rays to (-rays in vacuity? 4. Name bingle phenomenon indicating the swan nature of light and one phenomenon indicating its particle nature. 5. What is meant by half life of a hot substance? Q. NOS. 6 15 ARE OF 2 label EACH 6. If 100 Joule of work mustiness be done to move galvanizing charges equal to 4 units from a place, where effectiveness is 10 volt to another place, where potential is V volt, find the value of V. 7. Show that the capacitance of an insulated world(a) conductor is like a shot proportional to the radius of the spherical conductor. 8. If for each one of the guard in network, shown in figure is r, what is the resistance betwixt terminals A and B? [pic] 9. Show electromagnetic waves ar e crosswise in nature. 10. If two slits in Youngs essay pass water width ratio 1:4, deduce the ratio of color at maxima and minima in interference pattern. 11. Draw a designate ray diagram showing gradation of meet in a compound microscope. 12. A radioactive nitty-gritty undergoes a series of decays according to the sequence [pic]. If the mass tour and atomic human activity of A3 are 172 and 69 respectively, what is the mass fare and atomic number of A?
13. Explain the behaviour of metals, insulators and semiconductors on the basis of energy bands in solids. 14. What are the drawbacks of optical intercourse systems? 15. E! xplain the following terms: a. Population-inversion b. Optical pumping. Q. NOS. 16 - 25 ARE OF 3 MARKS EACH 16. Derive an font for the electric field intensity at a destine on the axial line of an electric dipole. OR 27 drops of same size are charged at 220 V each. They coalesce to form a bigger drop. Calculate...If you want to attempt a good essay, order it on our website:
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