A simple microscope or a magnifying glass with a focal length 5
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    Subject
    Physics

    Class

    ICSE Class 12

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    ISC Class 12 Physics Solved Question Paper 2006

    Multiple Choice QuestionsShort Answer Type

    11. What is the power factor of a series LCR circuit ?
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    12. For observing Fraunhofer diffraction from a single slit, what type of wave front should be incident on the slit ?
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    13. A ray of light falls on a right angled prism ABC (AB = BC) and travels as shown in Fig. below. What is the refractive index of the material of the prism ?  
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    14. A simple microscope or a magnifying glass with a focal length 5 cm forms an image at the near point of the eye. Find its magnification.

    M a g n i f i c a t i o n italic comma italic space M space equals space open parentheses 1 plus d over f close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space open square brackets 1 plus 25 over 5 close square brackets space equals space 6
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    15. How can a pile of glass plates be used to produce polarised light ?
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    16. State two basic differences between primary and secondary rainbows.
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    17. A radio transmitter operates on a wavelength of 1500 m at a power of 400 kW. Find the energy of the radio photons in joules.
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    18.

    The radius of the first orbit of the electron of a hydrogen atom is 5.3 x 10-11 m. What is the radius of its second orbit ?

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    19. What is a light emitting diode ?
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    20. How are p-type semiconductors produced ?
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    NCERT Solutions
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