Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2014)
done JEE Main Paper (Held On 11 April 2014) Total Questions - 2
question_answer1) If \[{{\lambda }_{o}}\]and \[\lambda \] be threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is:
[JEE Main Online Paper ( Held On 11 Apirl 2014 )
question_answer2) Based on the equation: \[\Delta E=-2.0\times {{10}^{-18}}J\left( \frac{1}{n_{2}^{2}}-\frac{1}{n_{1}^{2}} \right)\]the wavelength of the light that must be absorbed to excite hydrogen electron from level n = 1 to level n = 2 will be: \[(h=6.625\times {{10}^{-34}}Js,C=3\times {{10}^{8}}m{{s}^{-1}})\]
[JEE Main Online Paper ( Held On 11 Apirl 2014 )