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REVISION SET- 03, , CLASS – XII, SUB – PHYSICS, , TIME – 2 Hrs., F.M. – 100, , All questions are compulsory : 1), 2), 3), 4), 5), 6), 7), 8), , Define Seeback effect and pentier effect., How we say that Kirchoff second law is based on conversation of energy ?, Write down two application of electromagnet., What is difference between permanent magnet and electromagnet., Write down how X-ray produce ? and also write down its properties ., What is Maxwell displacement current ?, Write down two properties and two application of ultra violet rays., Find expression for lens maker formula or prove that thin lens,, , 1, 𝑓, , = 𝜇−1, , 1, , 𝑅1, , −, , 1, , 𝑅2, , ., , 9) Find expression for Refraction of light through curved surface. or,, 𝑛2, 𝑛1, 𝑛2−𝑛1, prove that for spherical surface., − =, ., 𝑣, , 𝑢, , 𝑅, , 10) Sketch Ray diagram for refraction of light through glass prism, and prove that, for prism 𝜇 =, , 𝐴 +𝑠𝑖𝑛, ), 2, 𝐴, 𝑠𝑖𝑛, 2, , (𝑠𝑖𝑛, , ., , 11) Write Malus law and Bruster law. What is polarisation of light ? and write down, two application of polarised light ?, 12) What is wave front ? Explain Hygen principle of wave front., 13) What is interference of light ? Write down its condition., 14) What do you mean by defraction of light ? and what is polarised and write, two application of polarised., 15) What is total internal reflection ? Write down its condition. also define critical, light., 16) Why the apparture of compound microscope kept small., 17) Explain Human Eye ? with neat and clean diagram., 18) What is Hysteresis loss. Define retentivity and coercivity., 19) What is optical fibre ? write its two application., ***********************