Question:
The metal which has the highest work function in the following is:
The metal which has the highest work function in the following is:
Show Hint
Platinum has one of the highest work functions among metals, making it harder to emit electrons.
Updated On: May 18, 2025
- Cesium (Cs)
- Sodium (Na)
- Aluminium (Al)
- Platinum (Pt)
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Work function is the minimum energy required to eject an electron from the metal surface. Platinum has a very high work function (~5.6 eV), whereas Cesium and Sodium have low values (~2.1 eV and ~2.3 eV respectively), and Aluminium is moderate (~4.3 eV).
Was this answer helpful?
0
0
Top Questions on Photoelectric Effect
- Draw a plot of frequency \( \nu \) of incident radiations as a function of stopping potential \( V_0 \) for a given photoemissive material. What information can be obtained from the value of the intercept on the stopping potential axis?
- CBSE CLASS XII - 2025
- Physics
- Photoelectric Effect
- The work function of a metal is 2 eV. What is the threshold frequency for the photoelectric emission? (Take Planck's constant $ h = 6.63 \times 10^{-34} \, \text{Js} $, $ 1 \, \text{eV} = 1.6 \times 10^{-19} \, \text{J} $)
- BITSAT - 2025
- Physics
- Photoelectric Effect
- A photo-emissive substance is illuminated with a radiation of wavelength $ \lambda_i $ so that it releases electrons with de-Broglie wavelength $ \lambda_e $. The longest wavelength of radiation that can emit photoelectron is $ \lambda_0 $. Expression for de-Broglie wavelength is given by : (m : mass of the electron, h : Planck's constant and c : speed of light)
- JEE Main - 2025
- Physics
- Photoelectric Effect
Which of the following statements are correct, if the threshold frequency of caesium is $ 5.16 \times 10^{14} \, \text{Hz} $?- JEE Main - 2025
- Chemistry
- Photoelectric Effect
- The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is
- JEE Main - 2025
- Physics
- Photoelectric Effect
View More Questions
Questions Asked in AP EAPCET exam
- If $ r_1 $ and $ r_2 $ are radii of two circles touching all the four circles $$ (x \pm r)^2 + (y \pm r)^2 = r^2, $$ then find the value of $$ \frac{r_1 + r_2}{r}. $$
- The differential equation corresponding to the family of parabolas whose axis is along $x = 1$ is
Identify the correct option from the following:- AP EAPCET - 2025
- Differential Equations
- If an electron in the excited state falls to ground state, a photon of energy 5 eV is emitted, then the wavelength of the photon is nearly
- AP EAPCET - 2025
- Nuclear physics
- The number of ways of dividing 15 persons into 3 groups containing 3, 5 and 7 persons so that two particular persons are not included into the 5 persons group is
- AP EAPCET - 2025
- Binomial theorem
- The domain and range of a real valued function \( f(x) = \cos (x-3) \) are respectively.
- AP EAPCET - 2025
- Functions
View More Questions