MHT CET 2025 22nd April Evening Shift | Dual Nature of Radiation Question 4 | Physics

Photoelectric emission takes place from a certain metal at threshold frequency $v$. If the radiation of frequency $4 v$ is incident on the metal plate, the maximum velocity of the emitted photoelectrons will be ( $m=$ mass of photoelectron, $h=$ Planck's constant)

$\sqrt{\frac{6 \mathrm{hv}}{\mathrm{m}}}$

$\sqrt{\frac{3 h v}{m}}$

$\sqrt{\frac{h v}{m}}$

$\sqrt{\frac{5 \mathrm{hv}}{\mathrm{m}}}$

MHT CET 2025 22nd April Evening Shift

MCQ (Single Correct Answer)

-0

The de-Broglie wavelength of a neutron at $27^{\circ} \mathrm{C}$ is ' $\lambda_0$ '. What will be its wavelength at $927^{\circ} \mathrm{C}$ ?

$\frac{\lambda_0}{4}$

$\frac{\lambda_0}{3}$

$\frac{\lambda_0}{2}$

$\frac{3 \lambda_0}{2}$

MHT CET 2025 22nd April Morning Shift

MCQ (Single Correct Answer)

-0

When a photosensitive metal surface is illuminated with radiation of wavelength ' $\lambda_1$ ', the stopping potential is ' $\mathrm{V}_1$ '. If the same surface is illuminated with radiation of wavelength ' $3 \lambda_1$ ', the stopping potential is $\frac{\mathrm{V}_1}{6}$. The threshold wavelength for the photosensitive metal surface is

$\frac{3}{2} \lambda_1$

$2 \lambda_1$

$5 \lambda_1$

$6 \lambda_1$

MHT CET 2025 22nd April Morning Shift

MCQ (Single Correct Answer)

-0

From photoelectric effect experiment, select the correct statement.

Photoelectric effect can be explained using wave theory of light.

The maximum kinetic energy of a photoelectron depends on the intensity of incident light.

The stopping potential depends only on the work function of the metal.

The saturation current increases as the intensity of incident light increases.

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