A) \[\text{6}\text{.22 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-34}}}\text{erg-sec}\]
B) \[\text{6}\text{.624 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-24}}}\text{erg-sec}\]
C) \[\text{6}\text{.624 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-27}}}\text{J-sec}\]
D) \[\text{6}\text{.624 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-34}}}\text{J-sec}\]
Correct Answer: D
Solution :
[d] \[{{\lambda }_{\min }}=\frac{ch}{eV}\therefore h=\left( \frac{eV}{c} \right){{\lambda }_{\min }}\] \[h=\frac{1.6\times {{10}^{-19}}\times 30000\times 0.141\times {{10}^{-10}}}{3\times {{10}^{8}}}\] \[\Rightarrow h=6.624\times {{10}^{-34}}J-\sec \]
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