Question

The maximum frequency of X-rays produced in an X-ray tube at an operating voltage of 25kV is

(h$=6.63\times {10}^{-34}Js$ and $c=3\times {10}^8$ m/s)

• A. $6.08\times {10}^{18}Hz$
• B. $4.06\times {10}^{18}Hz$
• C. $3.02\times {10}^{18}Hz$
• D. $9.2\times {10}^{18}Hz$

Answer 1

Answer: (A)

$6.08\times {10}^{18}Hz$

$Operatingvoltage=\frac{h\nu }{e}$

$\frac{operatingvoltage\times e}{h}=\nu$

$\nu =\frac{25\times {10}^3\times 1.6\times {10}^{-19}}{6.63\times {10}^{-34}}$

$=6.08\times {10}^{18}Hz$

So, the answer is option (A).