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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

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Application +4 | -1

In a photoelectric experiment for

4000\;\mathop A\limits^ \circ

incident radiation, the potential difference to stop the ejection is

2V.

If the incident light is changed to

3000\;\mathop A\limits^ \circ ,

then the potential required to stop the ejection of electrons will be

View answer and explanation

Correct option: D

Greater than

2\;V

Option D (Greater than 2 V) is correct because shorter wavelengths correspond to higher energy photons, requiring a greater stopping potential.

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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