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1
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The longest wavelength of light that can initiate photo electric effect in the metal of work function 9 eV is
A
$1.37 \times 10^{-7} \mathrm{~m}$
B
$1.5 \times 10^{-7} \mathrm{~m}$
C
$3.7 \times 10^{-7} \mathrm{~m}$
D
$4 \times 10^{-7} \mathrm{~m}$
2
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Energy required to remove an electron from aluminium surface is 4.2 eV . If light of wavelength $2000 \mathring{A}$ falls on the surface, the velocity of the fastest ejected electron the surface will be
A
$84 \times 10^5 \mathrm{~ms}^{-1}$
B
$7.4 \times 10^6 \mathrm{~ms}^{-1}$
C
$64 \times 10^5 \mathrm{~ms}^{-1}$
D
$84 \times 10^6 \mathrm{~ms}^{-1}$
3
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The following statement is correct in the case of photoelectric effect

A
For a given frequency of incident radiation, the stopping potential varies linearly with its intensity.
B
For a given frequency of incident radiation, the photocurrent is independent of its intensity.
C
For a given frequency of a incident radiation, the maximum kinetic energy of the photoelectrons is independent of its intensity.
D
For a frequency lower than cutoff frequency, photoelectric emissions can occur if intensity of incident light is increased slightly.
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a photoelectric experiment light of wavelength 800 nm produces photoelectrons with the smallest de-Broglie wavelength of 1 nm . Light of 400 nm produces photoelectrons with smallest de-Broglie wavelength of 0.5 nm. Then the work function of the metal used in the experiment is nearly.

A
1.03 eV
B
0.53 eV
C
2.03 eV
D
4.02 eV
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