An electron beam is accelerated by a potential difference V to hit a metallic target to produce X– rays. It produces continuous as well as characteristic X-rays. If λ min is the smallest possible wavelength of X-ray in the spectrum, the variation of log λ min with log V is correctly represented in: (a) (b) (c) (d)

Answer: (b). λmin = hc/eV Taking logs: log λmin = /e - log V This is a straight line with slope -1 and positive intercept: falling line. So the answer is (b).

An electron beam is accelerated by a potential difference V to hit a… | JEE Main 2017

Q12JEE Main 2017Medium

Davisson-Germer, Uncertainty, Compton & X-Rays

An electron beam is accelerated by a potential difference V to hit a metallic target to produce X– rays. It produces continuous as well as characteristic X-rays. If $\lambda$ min is the smallest possible wavelength of X-ray in the spectrum, the variation of log $\lambda$ min with log V is correctly represented in:

Show answer and solution

Answer: (b)

$\lambda_{min} = \frac{hc}{eV}$
Taking logs: $\log \lambda_{min} = \log\frac{hc}{e} - \log V$
This is a straight line with slope $-1$ and positive intercept: falling line.
So the answer is (b).

Report a mistake

Davisson-Germer, Uncertainty, Compton & X-Rays question from JEE Main 2017

More questions on Davisson-Germer, Uncertainty, Compton & X-Rays