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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

1 Hard

1 of 1

Application +4 | -1

A beam of

10.6 \mathrm{~eV}

photons of intensity

2.0 \mathrm{~W} / \mathrm{m}^2

falls on a platinum surface of area

1.0 \times 10^{-4} \mathrm{~m}^2

and work function

5.6 \mathrm{~eV}

. If

0.53 \%

of the incident photons eject photo electrons, then find the number of photoelectrons emitter per second and maximum energy of ejected electrons (in

\mathrm{eV}

) are

View answer and explanation

Correct option: A

6.25 \times 10^{11}, 5 \mathrm{~eV}

Option A (

6.25 \times 10^{11}, 5 \text{ eV}

) is correct because it accurately calculates the number of photoelectrons emitted per second and the maximum kinetic energy of the ejected electrons.

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