COMEDK 2025 Evening Shift | Dual Nature of Radiation Question 7 | Physics

A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the intercept of which

A. Depends on the nature of the metal used

B. Depends on the intensity of radiation

C. Depends both on the intensity and the nature of metal used

D. Is a constant and is same for all metals which is independent of the intensity of Incident radiation

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

de Broglie wave length associated with an electron accelerated through a potential difference ' V ' is ' $\lambda$ '. If the accelerating potential is halved, what will be the new wave length associated with the charged particle?

$\frac{\lambda}{\sqrt{2}}$

$\frac{\lambda}{2}$

$2 \lambda$

$\sqrt{2} \boldsymbol{\lambda}$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

Which of the following statement is wrong regarding the photo electric effect.

Photo electric current is directly proportional to the intensity of the incident radiation

The maximum kinetic energy of the electrons emitted depends on the intensity of the incident radiation

The maximum kinetic energy of the electrons emitted depends on the frequency of the incident radiation

The value of the stopping potential increases with the increase in frequency of the incident radiation.

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

A particle of mass $M$ at rest decays into masses $m_1$ and $m_2$ with non-zero velocities. The ratio of de Broglie wavelengths $\lambda_1$ and $\lambda_2$ of the particles is

$\frac{m_2}{m_1}$

$\frac{\sqrt{m_1}}{\sqrt{m_2}}$

$\frac{m_1}{m_2}$

$1: 1$

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