## Question

### Solution

Correct option is

40 kV

To produce characteristic X-rays, the energy of the incident electrons must be greater than the binding energy of the innermost electron. Thus the accelerating voltage must be greater than 40 kV, then the accelerated electrons will have energy greater than 40 keV.

#### SIMILAR QUESTIONS

Q1

The potential difference applied to an X-ray tube is increased. As s result, in the emitted radiation,

Q2

In an X-ray tube, electrons accelerated through a very high potential difference strike a metal target. If the potential difference is increased, the speed of the emitted X-rays

Q3

The operating voltage in an X-ray tube is 10 kV. The maximum energy of the emitted X-ray photons will be

Q4

An X-ray tube is operated at 66 kV. Then, in the continuous spectrum of the emitted X-rays

Q5

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

Q6

The maximum frequency of X-rays produced in an X-ray tube is v when the operating voltage is V. What is the maximum frequency of the X-rays when the operating voltage is ?

Q7

X-rays are incident normally on a crystal of lattice constant 0.6 nm. The first order reflection on diffraction from the crystal occurs at an angle of 30o. What is the wavelength of X-rays used?

Q8

The wavelength of line from an element of atomic number 41 is . Then the wavelength of line of an element of atomic number 21 is

Q9

An X-rays photon of wavelength and frequency v collides with an electron and bounces off. If are respectively the wavelength and frequency of the scattered photon, then

Q10

X-rays of wavelength are incident normally on a crystal and the second order reflection on diffraction from the crystal observed at an angle of 45o. The lattice constant of the crystal is