Question:
Assertion (A): Electrons are ejected from the surface of zinc when it is irradiated by yellow light.
Reason (R): Energy associated with a photon of yellow light is more than the work function of zinc.
Assertion (A): Electrons are ejected from the surface of zinc when it is irradiated by yellow light.
Reason (R): Energy associated with a photon of yellow light is more than the work function of zinc.
Reason (R): Energy associated with a photon of yellow light is more than the work function of zinc.
Show Hint
The photoelectric effect occurs only if the incident light frequency is above the threshold frequency of the metal.
Updated On: Jan 13, 2026
- If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
- If Assertion (A) is true and Reason (R) is false.
- If both Assertion (A) and Reason (R) are false.
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Explanation of the Photoelectric Effect:
- The work function of zinc is greater than the energy of yellow light photons, meaning yellow light cannot eject electrons.
- Since the energy of yellow light is insufficient, Reason (R) is also false.
Thus, both Assertion (A) and Reason (R) are incorrect.
- The work function of zinc is greater than the energy of yellow light photons, meaning yellow light cannot eject electrons.
- Since the energy of yellow light is insufficient, Reason (R) is also false.
Thus, both Assertion (A) and Reason (R) are incorrect.
Was this answer helpful?
0
0
Top Questions on Photoelectric Effect
- In a series combination of capacitors connected across a battery
- CUET (UG) - 2025
- Physics
- Photoelectric Effect
- The stopping potential for photoelectric emission from a metal surface is 2 V when light of wavelength 400 nm is incident. What will be the stopping potential for light of wavelength 300 nm? (Planck’s constant \( h = 6.63 \times 10^{-34} \) Js, speed of light \( c = 3 \times 10^8 \) m/s, charge of electron \( e = 1.6 \times 10^{-19} \) C)
- CUET (UG) - 2025
- Physics
- Photoelectric Effect
- The work function of a metal 3eV. The colour of the visible light that is required to cause emission of photo electrons is:
- JEE Main - 2025
- Physics
- Photoelectric Effect
- A light source of wavelength \( \lambda \) illuminates a metal surface, and electrons are ejected with a maximum kinetic energy of 2 eV. If the same surface is illuminated by a light source of wavelength \( \frac{\lambda}{2} \), then the maximum kinetic energy of ejected electrons will be (The work function of the metal is 1 eV).
- JEE Main - 2025
- Physics
- Photoelectric Effect
- In the photoelectric effect, an electromagnetic wave is incident on a metal surface and electrons are ejected from the surface. If the work function of the metal is 2.14 eV and the stopping potential is 2V, what is the wavelength of the electromagnetic wave? Given \( hc = 1242 \, \text{eV} \cdot \text{nm} \) where \( h \) is the Planck constant and \( c \) is the speed of light in vacuum.
- JEE Main - 2025
- Physics
- Photoelectric Effect
View More Questions
Questions Asked in CBSE CLASS XII exam
- Find the least value of ‘a’ so that $f(x) = 2x^2 - ax + 3$ is an increasing function on $[2, 4]$.
- CBSE CLASS XII - 2025
- Functions
- A resistor of 400 \( \Omega \), an inductor of \( \frac{5}{\pi} \) H, and a capacitor of \( \frac{50}{\pi} \) µF are joined in series across an AC source \( v = 140 \sin (100 \pi t) \) V. Find the rms voltages across these three circuit elements. The algebraic sum of these voltages is more than the rms voltage of source. Explain.
- CBSE CLASS XII - 2025
- AC Circuits
- ``All producer goods are essentially capital goods.''
Defend or refute the given statement, with the help of a suitable example.- CBSE CLASS XII - 2025
- National Income Accounting
Reactant ‘A’ underwent a decomposition reaction. The concentration of ‘A’ was measured periodically and recorded in the table given below:
Based on the above data, predict the order of the reaction and write the expression for the rate law.- CBSE CLASS XII - 2025
- Chemical Kinetics
- Assertion (A): A charged particle is moving with velocity \( v \) in \( x \)-\( y \) plane, making an angle \( \theta \) (\( 0<\theta<90^\circ \)) with \( x \)-axis. If a uniform magnetic field is applied in the region, along \( y \)-axis, the particle will move in a helical path with its axis parallel to \( x \)-axis.
Reason (R): The direction of the magnetic force acting on a charged particle moving in a magnetic field is along the velocity of the particle.- CBSE CLASS XII - 2025
- Electromagnetism
View More Questions