A) \[0.1227\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[12.27\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[0.001227\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[1.227\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
: de Broglie wavelength of the electron accelerated through a potential difference of V volt is \[\lambda =\frac{12.27}{\sqrt{V}}\overset{\text{o}}{\mathop{\text{A}}}\,\] For V = 100 volt \[\lambda =\frac{12.27}{\sqrt{100}}\overset{\text{o}}{\mathop{\text{A}}}\,=1.227\overset{\text{o}}{\mathop{\text{A}}}\,\]
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