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Photoelectric effect and dual nature of matter questions with solutions
Practice Photoelectric effect and dual nature of matter for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
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- MCQmediumPhotoelectric effect and dual nature of matter
Two different metals A and B are illuminated by the same monochromatic radiation of wavelength 300 nm. Their measured stopping potentials are 2.0 V and 0.5 V respectively. Which statement about their work functions is correct?
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JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
A photocathode is illuminated separately by two monochromatic sources placed at equal distances. The photocurrent-versus-anode-voltage curves are shown as curve 1 and curve 2. In what respect do the two sources differ? Image
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JEE MainsAdvanced
Open question & full solution → - NumericmediumPhotoelectric effect and dual nature of matter
An electron starts from rest and is accelerated through a potential difference V. The accelerating potential is then increased by 21%, while relativistic effects remain negligible. If the percentage decrease in the electron's de Broglie wavelength is approximately N%, find N to the nearest integer.
JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
Light coming from a discharge tube filled with hydrogen falls on the cathode of the photoelectric cell. The work function of the surface of cathode is 4 eV. Which one of the following values of the anode voltage (in volts) with respect to the cathode will likely to make the photo current zero.
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JEE MainsAdvanced
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
An electron of mass m moves in a uniform electric field E = -2E₀ î, where E₀ is a positive constant. Its initial velocity is v₀ î, where v₀ > 0. If λ₀ = h /(4mv₀), which expression gives the electron's de Broglie wavelength at time t? Here e denotes the magnitude of the electronic charge.
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JEE Mains 2026 5 April Morning Shift
Open question & full solution → - NumericmediumPhotoelectric effect and dual nature of matter
A photon and a non-relativistic electron have the same wavelength of 0.10 nm. Take h = 6.63×10⁻³⁴ J·s, c = 3.0×10⁸ m·s⁻¹ and mₑ = 9.1×10⁻³¹ kg. If the photon energy divided by the electron kinetic energy is approximately N, find N to the nearest integer.
JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
A perfectly absorbing sphere of radius R is completely illuminated by a broad, uniform, parallel light beam of intensity I. The beam direction passes through the centre of the sphere. What is the net radiation force on the sphere along the beam direction?
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JEE MainsNEETJEE Advanced
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
A monochromatic source emits electromagnetic radiation with total power 15 kW at a rate of 2.5×10²² photons per second. Taking h = 6.6×10⁻³⁴ J·s and c = 3×10⁸ m·s⁻¹, in which region of the electromagnetic spectrum does the radiation lie?
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JEE Mains 2026 8 April Evening Shift
Open question & full solution → - Multi-correctmediumPhotoelectric effect and dual nature of matter
The accelerating potential (V) applied between a photocathode and the respective anode is such that the fastest photoelectron can fly only one fourth of the distance between the cathode and the anode. If the distance between photocathode and anode is reduced to (1/4)th of the original value while maintaining the accelerating potential constant, then:
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JEE MainsAdvanced
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
The graph in the figure shows stopping potential V₀ as a function of the frequency ν of incident radiation for three photosensitive metals X₁, X₂ and X₃. Their threshold frequencies increase in the order X₁, X₂, X₃. If all three metals are illuminated with radiation of the same wavelength whose frequency is above all three thresholds, which metal emits photoelectrons with the greatest maximum kinetic energy?
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JEE Mains 2026 4 April Morning Shift
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