Question

If the incident electrons in Coolidge tube are accelerated through a potential of V volt, then the maximum frequency of continuous X-rays will be

• A. V
• B. hV
• C. $\frac{eV}{h}$
• D. $\frac{h}{eV}$

Answer 1

The correct option is C $\frac{eV}{h}$

Energy gained by an electron by being accelerated by a voltage V:
$E=eV$
This energy is completely used to generate X-rays.
Energy of radiation is given by:
$E=h\nu$
Comparing the two, we get:
$\nu =\frac{eV}{h}$