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JEE Main Test 8...

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  • Question 1
    4 / -1

    Two point white does are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye? [take wavelength of light = 500 nm]

  • Question 2
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  • Question 3
    4 / -1

    The angle between two diagonals of a cube is

  • Question 4
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  • Question 5
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    A die is thrown. If A is the event that the number obtained is greater than 3 and B is the event that the number obtained is less than 5. Then, P(A ∪ B) is

  • Question 6
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    A p-n junction has acceptor impurity concentration of 17 cm-3 in the P side and donor impurity concentration of 1016 cm-3 in the N side. What is the contact potential at the junction? (kT = thermal energy, intrinsic carrier concentration ni = 1.4 × 1016 cm-3 )

  • Question 7
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    The ionisation potential of hydrogen atom is –13.6 eV. An electron in the ground state of a hydrogen atoms absorbs a photon of energy 1275 eV. How many different spectral line can one expect when the electron make a downward transition?

  • Question 8
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    The remainder obtained when 1! + 2! + 3 ! + ..... + 11 ! is divided by 12 is

  • Question 9
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    The relation between half - life (T) and decay constant (λ) is

  • Question 10
    4 / -1

    A polarised light of intensity I0 is passed through another polariser whose pass axis makes an angle 60o with the pass axis of the former. What is the intensity of emergent polarised light from second polariser?

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