Stopping Potential

Mediumphysics

Stopping potential V0 relates to K_max by?

Select the correct option:

$e V 0 = K_{m} a x$

$V 0 = e K_{m} a x$

$e / V 0 = K_{m} a x$

$e V 0 = K_{m} a x^{2}$

🔒 Solution Hidden from View

Submit your answer to unlock the detailed step-by-step solution.

About This Question

Subject: physics
Chapter: dual nature
Topic: stopping potential
Difficulty: Medium
Year: 2025

Solution

Correct Answer:

$e V 0 = K_{m} a x$

Definition of Stopping Potential ( $V_{0}$ ): The negative potential applied to the collector plate that is just sufficient to stop the fastest moving photoelectrons from reaching it.
Energy Relation: At the stopping potential, the work done by the retarding electric field on the electron must equal its maximum kinetic energy.
Equation: $W = q V ⟹$ Energy $= e V_{0}$ .
Final Link: $K_{ma x} = e V_{0}$ .
Combined Equation: $e V_{0} = h f - ϕ$ , which allows for experimental determination of Planck's constant.

This medium difficulty physics question is from the chapter dual nature, covering the topic of stopping potential. It appeared in the 2025 exam.

Looking for more practice? Explore all physics questions or browse dual nature questions on RankGuru.

Stopping Potential

Select the correct option:

Solution

🔒 Solution Hidden from View

More stopping potential Practice Questions

Light of wavelength 400 nm illuminates a potassium surface of work function 2.0 eV in a vacuum photo...

In a photoelectric experiment the fastest electrons emitted from a cathode are found to have a maxim...

In a graph of stopping potential plotted against the frequency of incident light for a given metal, ...

During a photoelectric experiment the reverse voltage at which the photocurrent just becomes zero is...

Monochromatic radiation of wavelength $248 nm$ falls on a photosensitive cathode whose work ...

Two different metals are each tested in a photocell, and for both the stopping potential is plotted ...

About This Question

Solution

Stopping Potential

Select the correct option:

Solution

🔒 Solution Hidden from View

More stopping potential Practice Questions

Light of wavelength 400 nm illuminates a potassium surface of work function 2.0 eV in a vacuum photo...

In a photoelectric experiment the fastest electrons emitted from a cathode are found to have a maxim...

In a graph of stopping potential plotted against the frequency of incident light for a given metal, ...

During a photoelectric experiment the reverse voltage at which the photocurrent just becomes zero is...

Monochromatic radiation of wavelength 248 nm falls on a photosensitive cathode whose work ...

Two different metals are each tested in a photocell, and for both the stopping potential is plotted ...

About This Question

Solution

Monochromatic radiation of wavelength $248 nm$ falls on a photosensitive cathode whose work ...