Figure shows the intensity-wavelength relations of X-rays coming from two different Coolidge tube. The solid curve represents the relation for the tube A in which the potential difference between the target and the filament is `V_A` and the atomic number of the target material is `Z_A`. These quantities are `V_beta` and `Z_beta` for the other tube. Then,

Options

A. `V_(A) gt V_(B),Z_(A) gt Z_(B)`
B. `V_(A) gt V_(B),Z_(A) lt Z_(B)`
C. `V_(A) lt V_(B),Z_(A) gt Z_(B)`
D. `V_(A) lt V_(B),Z_(A) lt Z_(B)`

Answer

B

Explanation

`(lambda_(A))_(min)lt(lambda_(B))_(min)`
`V_(A)gtV_(B) ("Since" lambda_(min)prop1//V)`
`(lambda_(K_(alpha)))_(A)gt(lambda_(K_(alpha)))_(beta)`
`Z_(A) lt Z_(B)("Since" lambda_(K)prop1//Z^(2))`