KVPY Government Jobs Exams

A metal is irradiated with light of wavelength 660 nm. Given that the work that the work function of the metal is
1.0 eV, the de Broglie wavelength of the ejected electron is close to

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KVPY Other Question
In the DNA of E. Coli the mole ratio of adenine to cytosine is 0.7. If the number of moles of adenine in the DNA is
350000, the number of moles of guanine is equal to –
(A) 350000 (B) 500000 (C) 225000 (D) 700000 The inter-planar spacing between the (2 2 1) planes of a cubic lattice of length 450 pm is