A) \[12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[0.31\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[0.124\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
Wavelength of X-ray \[=\frac{12375}{V}\overset{\text{o}}{\mathop{\text{A}}}\,\] Energy of electron \[=100\text{ }keV=100\text{ }x\text{ }103\text{ }eV.\] \[\therefore \]Voltage with which electron is accelerated \[=100\times {{10}^{3}}V\] \[\therefore \] Wavelength of X-ray \[=\frac{12375}{100\times {{10}^{3}}}=0.12375\overset{\text{o}}{\mathop{\text{A}}}\,\] \[=0.124\overset{\text{o}}{\mathop{\text{A}}}\,\]
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