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Physics Sample Papers 2009
Question no.1-8 carries 1 mark each , Question no 9-18 carries 2 marks each , question no 19 – 27 carries 3 marks each and question no 28-30 carries 5 marks each.
1. What do you meant by dielectric strength? Give its unit.
2. Under what condition we say that resonance condition is attained in cyclotron?
3. A light bulb and an open coil inductor are connected to an a.c source through a key in series. What happens to the brightness of bulb when an iron rod is introduced inside the inductor? Why?
4. Unpolarised light is incident on a plane glass surface of refractive index 1.5 What should be the angle of incidence so that the reflected and refracted rays are perpendicular to each other.
5. Two beams one of red light and the other of blue light of the same intensity are incident on a metallic surface to emit photo electron. Which one the two beams emits electrons of greater kinetic energy. justify
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Class 12th Physics sample papers 2009