Question

The curves $P$ and $Q$ schematically show the variation of X-ray intensity with wavelength at two different accelerating voltages for a given target material. In the figure, $\lambda_1 = 0.25$ Å, $\lambda_2 = 0.5$ Å, $\lambda_3 = 1.0$ Å, and $\lambda_4 = 2.25$ Å. Take Planck's constant as $6.6 \times 10^{-34}$ Js, the speed of light as $3 \times 10^8$ m/s, and the elementary charge as $1.6 \times 10^{-19}$ C.

Which of the following statement is/are true?

• A. The accelerating potential corresponding to curve P is greater than that of curve Q
• B. The accelerating potential applied to obtain curve Q is 24750 V
• C. Peaks (II) and (IV) correspond to radiative transitions from L to K shells
• D. Peaks (I) and (III) correspond to radiative transitions from N to K shells

Answer 1

Answer: (A), (B), (C)

The accelerating potential corresponding to curve P is greater than that of curve Q

Answer 2

The correct Answers are (A) :The accelerating potential corresponding to curve P is greater than that of curve Q(,B):The accelerating potential applied to obtain curve Q is 24750 V,(C):Peaks (II) and (IV) correspond to radiative transitions from L to K shells