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Physics Test 40...

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  • Question 1
    4 / -1

    In an electromagnetic wave, at any instant the electric field was found to oscillate with an amplitude of 18v/m. The magnitude of oscillating magnetic field will be - 

  • Question 2
    4 / -1

    Flux ϕ (in weber) in a closed circuit of resistance 10 ohm varies with time t (in sec) according to the equation :-

    ϕ = 6t2 – 5t + 1

    What is the magnitude of the induced current at t = 0.25 sec ?

  • Question 3
    4 / -1

    A person can not see the objects beyond 50 cm. The power of a lens to correct this vision will be 

  • Question 4
    4 / -1

     

    Two tree  are at distance of 3.14 m from each other. What should the maximum distance of an observer from tree to see them separately

  • Question 5
    4 / -1

    A double slit experiment is shown in the figure. Each slit has width W. A thin piece of glass of thickness δ refractive index µ, is placed between one of the slits and the screen. The intensity at the central point is measured as a function of thickness δ. For what values of δ is the intensity at C is minimum.

  • Question 6
    4 / -1

    The energy of a photon of light of wavelength 450 nm is :

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