1
MHT CET 2024 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the frequency of incident radiation $(\nu)$ is increased, keeping other factors constant, the stopping potential ( $\nu>\nu_0$, threshold frequency)

A
increases
B
decreases
C
remains constant
D
suddenly becomes zero
2
MHT CET 2024 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the potential difference used to accelerate electrons is doubled. By what factor does the deBroglie wavelength $(\lambda)$ associated with the electrons change?

A
$\lambda$ is increased to $\sqrt{2}$ times.
B
$\lambda$ is increased to $\frac{1}{\sqrt{2}}$ times.
C
$\lambda$ is decreased to $\frac{1}{\sqrt{2}}$ times.
D
$\lambda$ is decreased to $\sqrt{2}$ times.
3
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A photoelectric surface is illuminated successively by monochromatic light of wavelength ' $\lambda$ ' and $\left(\frac{\lambda}{2}\right)$. If the maximum kinetic energy of the emitted photoelectrons in the first case is one-fourth that in the second case, the work function of the surface of the material is ( $\mathrm{c}=$ speed of light, $\mathrm{h}=$ Planck's constant$)$

A
$\frac{2 \mathrm{hc}}{\lambda}$
B
$\frac{\mathrm{hc}}{\lambda}$
C
$\frac{2 h \mathrm{c}}{3 \lambda}$
D
$\frac{\mathrm{hc}}{3 \lambda}$
4
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a photosensitive surface is irradiated by lights of wavelengths ' $\lambda_1$ ' and ' $\lambda_2$ ', kinetic energies of the emitted photoelectrons is ' $E_1$ ' and ' $E_2$ ' respectively. The work function of the photosensitive surface is

A
$\frac{\left(E_2 \lambda_2-E_1 \lambda_1\right)}{\left(\lambda_2-\lambda_1\right)}$
B
$\frac{\left(E_1 \lambda_1+E_2 \lambda_2\right)}{\left(\lambda_2-\lambda_1\right)}$
C
$\frac{\left(E_1 \lambda_1-E_2 \lambda_2\right)}{\left(\lambda_2-\lambda_1\right)}$
D
$\frac{\left(E_2 \lambda_2+E_1 \lambda_1\right)}{\left(\lambda_1-\lambda_2\right)}$
MHT CET Subjects
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