What is the minimum wavelength of X–rays

If 15 kV is the P.D. between the cathode and target and it produces continuous' X-Ray specturm, then what is the minimum wavelength of X-Ray?

The minimum wavelength of X-rays produced in an X-ray tube is lambda when the operating voltage is V. What is the minimum wavelength of the X-rays when the operating voltage is V/2?

If the X–ray tube is working at 25 kV then the minimum wavelength of X–rays will be

Voltage applied between cathode and anode of an X-ray tube is 18 kV. Calculate the minimum wavelength of the X-rays produced.

Calculate the minimum wavelength of X-rays produced by an X-ray tube operating at 30 kV. h=6.6 times 10^(-27) erg-sec]

The K -absorption edge of an unknown element is 0.171 Å a. Identify the element. b. Find the average wavelength of the K_(alpha),K_(alpha),K_(beta),K_(gamma) lines. c. If a 100 e V electron strikes the target of this element , what is the minimum wavelength of the x-ray emitted?