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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

1 Easy

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Application +4 | -1

When UV light of wavelength

300 \mathrm{~nm}

is incident on the metal surface having work function

2.13 \mathrm{~eV}

, electron emission takes place. The stopping potential is :

(

Given

\mathrm{hc}=1240 \mathrm{~eV} \mathrm{~nm})

View answer and explanation

Correct option: C

2 V

Option C (2 V) is correct because the stopping potential is calculated using the photoelectric effect equation.

More Questions from DUAL NATURE OF RADIATION AND MATTER

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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