The energy of an electron in an excited hydrogen atom is $\;-3.4 e V \;.$ Calculate the angular momentum of electron according to Bor's theorey. Plan ck's constant h= $\;6.626\times10^{-34} J-s\;.$

Question

$(a)\;2.11\times10^{-38} J-s \qquad(b)\;2.11\times10^{-31} J-s\qquad(c)\;2.11\times10^{-30} J-s\qquad(d)\;2.11\times10^{-34} J-s$