Question

Calculate the wavelength of electrons accelerated from rest through a potential

difference of 40 kV.​

Answer 1

Answer:

Explanation:

If electrons are accelerated to a velocity v by a potential difference V and then allowed to collide with a metal target, the maximum frequency of the X-rays emitted is given by the equation:

1/2 ​mv2=eV=hν

or, λmin​=1240​/V

So this shows that the minimum wavelength is inversely proportional to the accelerating voltage. Here accelerating voltage are same so the minimum wavelength is same.

So, the answer is option (A)