Question

If the potential difference between the anode and cathode of the $X-$ray tube increases

• A. the peaks at $R$ and $S$ would move to shorter wavelength
• B. the peaks at $R$ and $S$ would remain at the same wavelength
• C. the cut off wavelength at $P$ would decrease
• D. (b) and (c) both are correct

Answer 1

The correct option is D (b) and (c) both are correct

Peaks on the graph represent characteristic $X-$ray spectrum.
Every peak has a certain wavelength, which depends upon the transition of electron inside the atom of the target.

$\Rightarrow$the peaks at $R$ and $S$ would remain at the same wavelength

While ${\lambda }_{min}$ depends upon the accelerating voltage (As. ${\lambda }_{min}\propto 1/V$).

$\Rightarrow$ the cut off wavelength at $P$ would decrease

Option(d)