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JEE X-rays PYQs with Solutions

50 previous year questions from X-rays (JEE Main & Advanced Physics) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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About X-rays PYQs

X-rays has 50 previous year questions in the Quantrex Academy JEE Main & Advanced Physics bank. The 50 questions in this list come from Concepts Of Physics MCQ Edition [Volume 2] (50). Each question opens on its own page with the options, the correct answer and the worked solution where available.

JEE X-rays PYQs with Solutions

About X-rays PYQs

X-rays questions with solutions

Calculate the cutoff wavelength of the continuous X-rays produced by an X-ray tube operating at 30 kV .

Determine the energy, the frequency, and the momentum of an X-ray photon having a wavelength of 0.10 nm .

Iron emits a K_α X-ray with an energy of 6.4 keV , while calcium emits a K_α X-ray with an energy of 3.69 keV . Determine the time taken by an iron K_α photon and a calcium K_α

X-rays originating from a Coolidge tube have a cutoff wavelength of 80 pm . Determine the kinetic energy of the electrons striking the target.

What potential difference must be applied across an X-ray tube to generate X-rays with a wavelength of no less than 0.10 nm ? Additionally, what is the maximum energy of a photon

In an X-ray tube, the distance separating the cathode (filament) and the target is 1.5 m . Determine the electric field between the cathode and the target if the cutoff wavelength

In a colour TV, the electron beam is accelerated through 32 kV before striking the screen. Determine the wavelength of the most energetic X-ray photon produced.

When the operating potential in an X-ray tube is raised by 1\% , by what percentage will the cutoff wavelength decrease?

When 40 kV is applied across an X-ray tube, X-rays are obtained with a maximum frequency of 9.7 × 10^ 18 Hz . Determine the value of the Planck constant from these data.

An X-ray tube operates at 40 kV . Assume that during each collision, the electron converts 70\% of its energy into a photon. Determine the lowest three wavelengths emitted from

For tungsten, the wavelength of the K_α X-ray is 21.3 pm . Ejecting an electron from the L shell of a tungsten atom requires 11.3 keV . Determine the minimum accelerating voltage

An argon atom has a K_β X-ray wavelength of 0.36 nm . To ionize an argon atom, a minimum energy of 16 eV is required. Determine the energy necessary to knock out an electron from

Aluminium ( Z = 13 ) and zinc ( Z = 30 ) emit K_α X-rays with wavelengths of 887 pm and 146 pm , respectively. Applying Moseley's law ν = a(Z - b) , determine the wavelength of

The K_α X-rays of aluminium ( Z = 13 ) and zinc ( Z = 30 ) possess wavelengths of 887 pm and 146 pm , respectively. A particular element emits a K_α X-ray with an energy of 3.69

By applying Moseley's law with b = 1 , calculate the frequency of the K_α X-ray of La ( Z = 57 ) given that the frequency of the K_α X-ray of Cu ( Z = 29 ) is 1.88 × 10^ 18 Hz .

The K_β X-rays from certain elements are provided below. Element Ne P Ca Mn Zn Br Energy (keV) 0.858 2.14 4.02 6.51 9.57 13.3 If a Moseley-type plot of ν versus Z is drawn for the

The wavelengths of the K_α and K_β X-rays of molybdenum are 0.71 and 0.63 , respectively. Determine the wavelength of the L_α X-ray of molybdenum.

For a certain material, the wavelengths of the K_α and L_α X-rays are given as 21.3 pm and 141 pm , respectively. Determine the wavelength of the K_β X-ray for this material.

When the operating voltage of an X-ray tube is raised to 1.5 times its initial value, the short-wavelength limit undergoes a shift of 26 pm . Determine the initial operating

Determine the maximum potential difference that may be applied across an X-ray tube with a tungsten target without emitting any characteristic K or L X-rays. The energy levels of

Operating at 40 kV , an X-ray tube has an electric current of 10 mA flowing from the target to the filament. Assuming that, on average, 1\% of the total kinetic energy of the

An X-ray tube operating at 20 kV produces heat at a rate of 200 W . Determine the current in the circuit, assuming that only a small fraction of the kinetic energy of the

Relative to the energy of the atom with no vacancy, the energy of a silver atom with a vacancy in the K shell is 25.31 keV higher, in the L shell is 3.56 keV higher, and in the M

Operating at 40 kV , an X-ray tube has an electric current of 10 mA flowing from the target to the filament. Assuming that, on average, 1\% of the total kinetic energy of the

A piece of tissue paper soaked in polluted water is irradiated with continuous X-rays. The incident X-rays knock electrons out of the inner shells of the sample's atoms, causing

A free iron atom emits K_α X-rays having an energy of 6.4 keV . Determine the recoil kinetic energy of the atom. The mass of an iron atom is 9.3 × 10^ -26 kg .

In a photoelectric experiment, the stopping potential exhibits a linear relationship with the inverse of the wavelength (1/λ) of the light incident on the cathode. Additionally

Consider a monochromatic X-ray beam with a wavelength of 100 pm passing through a Young's double slit. The resulting interference pattern is recorded on a photographic plate

An X-ray beam is capable of being deflected

Consider a continuous X-ray photon emitted from a Coolidge tube. The energy of this photon is derived from

In a Coolidge tube, the energy of a characteristic X-ray photon is derived from

If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength

When the current in the circuit used to heat the filament is increased, the cutoff wavelength

An X-ray beam emerging from an X-ray tube

Moseley's law describing characteristic X-rays is expressed as ν = a(Z - b) . In this formula,

The frequencies of K_α X-rays for various materials are measured. Which of the graphs in the figure could represent the relationship between the frequency ν and the atomic number

Among the following wavelengths, one is absent while the rest are present in the X-rays emitted by a Coolidge tube. Identify the absent wavelength.

The provided figure illustrates the intensity–wavelength relations of X-rays emitted from two different Coolidge tubes. The solid curve corresponds to tube A , where the potential

Half ( 50\% ) of the X-rays emitted from a Coolidge tube are able to pass through a 0.1 mm thick aluminium foil. If the potential difference between the target and the filament is

Exactly 50\% of the X-rays emitted from a Coolidge tube are able to transmit through an aluminium foil of thickness 0.1 mm . If the potential difference between the target and the

X-rays from a Coolidge tube are incident on a thin aluminium foil, and the intensity of the transmitted X-rays is observed to be I_0 . If the heating current is subsequently

When visible light travels through a circular hole, it produces a diffraction disc of radius 0.1 mm on a screen. If X-rays are transmitted through the identical set-up, the radius

In the case of harder X-rays,

For a specific material, the energies and wavelengths of its characteristic X-rays satisfy which of the following relations?

When the potential difference applied across an X-ray tube is increased, what happens to the emitted radiation?

The cutoff wavelength of X-rays emitted by a Coolidge tube depends on the

Identify the correct statements.

Consider a continuous X-ray photon and a characteristic X-ray photon that possess the same wavelength. Which of the following differs between the two photons?

When an X-ray is incident on a material, it

As an electron impacts the target inside a Coolidge tube, its total kinetic energy

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