Back to DUAL NATURE OF RADIATION AND MATTER

NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

1 Medium

1 of 1

Analyzing +4 | -1

Statement-1: When ultraviolet light is incident on a photocell, its stopping potential is

{V}_0

and the maximum kinetic energy of the photoelectrons is

{K}_{\max }

. When the ultraviolet light is replaced by

{X}

rays, both

{V}_0

and

{K}_{\max }

increases.

Statement-2: Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.

View answer and explanation

Correct option: C

Statement-1 is true, statement- 2 is false.

Option C is correct because Statement-1 is true (X-rays have higher energy, thus increasing stopping potential and maximum kinetic energy), but Statement-2 is false (photoelectrons have a range of speeds due to interactions within the metal, not the range of frequencies in incident light).

More Questions from DUAL NATURE OF RADIATION AND MATTER

Practice All Chapter MCQs →

If the Broglie wavelengths associated with a proton and an

\alpha

- particle are equal, then the ratio of velocities of the proton and the

\alpha

- particle will be: If the wavelength of incident light changes from 400 nm to 300 nm, the stopping potential for photoelectrons emitted from a surface becomes approximately In photo-electric effect, when graph is plotted for stopping potential versus frequency of incident light, for different metals, then: The radiation corresponding to

3 \to 2

transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of

3 \times {10^{ - 4}}\,T.

If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to The shortest wavelength of

X

-rays emitted from an

X

-ray tube depends on the Planck’s constant has the dimensions of