Question

Find the maximum frequency of the X-rays emitted by an X-ray tube operating at 30KV.

• A. $7.2\times {10}^{18}Hz$
• B. $7.2\times {10}^{15}Hz$
• C. $14.4\times {10}^{18}Hz$
• D. $14.4\times {10}^{15}Hz$

Answer 1

The correct option is A

$7.2\times {10}^{18}Hz$

We know that frequency, $\nu =\frac{eV}{h}=\frac{e\times 30\times {10}^{3}V}{4.14\times {10}^{-15}eVs}=7.2\times {10}^{18}Hz$