The intensity of X-rays from a Coolidge tube is plotted against wavelength $λ$ as shown in the figure. The minimum wavelength found is $λ_{C}$ and the wavelength of the $K_{α}$ line is $λ_{K}$ . As the accelerating voltage is increased [2001]

Question

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(1)

In case of Coolidge tube, $λ_{C}$

Thus the minimum wavelength is inversely proportional to accelerating voltage. As $V$ increases, $λ_{c}$ decreases. $λ_{k}$ is the wavelength of $K_{α}$ line which is independent of accelerating voltage of bombarding electron. Since $λ_{k}$ always refers to a photon wavelength of transition of $e^{-}$ from the target element from $2 \to 1$ . Therefore $λ_{k} - λ_{c}$ increases as accelerating voltage is increased.

Solution

Q.
The intensity of X-rays from a Coolidge tube is plotted against wavelength $λ$ as shown in the figure. The minimum wavelength found is $λ_{C}$ and the wavelength of the $K_{α}$ line is $λ_{K}$ . As the accelerating voltage is increased [2001]

1 $λ_{K} - λ_{C}$ increases

2 $λ_{K} - λ_{C}$ decreases

3 $λ_{K}$ increases

4 $λ_{K}$ decreases

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Solution

Q. The intensity of X-rays from a Coolidge tube is plotted against wavelength λ as shown in the figure. The minimum wavelength found is λC and the wavelength of the Kα line is λK. As the accelerating voltage is increased [2001]

1 λK-λC increases

2 λK-λC decreases

3 λK increases