1
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a certain metallic surface is illuminated with monochromatic light wavelength $\lambda$, the stopping potential for photoelectric current is $4 \mathrm{~V}_0$. When the same surface is illuminated with light of wavelength $3 \lambda$, the stopping potential is $\mathrm{V}_0$. The threshold wavelength for this surface for photoelectric effect is

A
$\quad 9 \lambda$
B
$\frac{\lambda}{9}$
C
$3 \lambda$
D
$\frac{\lambda}{3}$
2
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The stopping potential as a function of frequency of incident radiation is plotted for two different photoelectric surfaces A and B. The graph shows that the work function of A is

MHT CET 2024 15th May Evening Shift Physics - Dual Nature of Radiation Question 31 English

A
greater than that of B.
B
smaller than that of B.
C
same as that of B.
D
that no comparison can be made from the graphs.
3
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two photons having energies twice and thrice the work function of metal are incident one after another on the metal surface. Then the ratio of maximum velocities of the photoelectrons emitted in the two cases is respectively

A
$\sqrt{3}: 3$
B
$\sqrt{2}: \sqrt{3}$
C
$1: \sqrt{2}$
D
$\sqrt{3}: 1$
4
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Electrons are accelerated through a potential difference of 16 kV . If the potential difference is increased to 64 kV , then de-Broglie wavelength associated with electron will

A
remain same.
B
becomes half.
C
becomes four time.
D
becomes quarter.
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