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1
TG EAPCET 2025 (Online) 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When electromagnetic radiation of wavelength 310 nm falls on the surface of a metal having work function 3.55 eV , the velocity of photoelectrons emitted is $x \times 10^5 \mathrm{~ms}^{-1}$. The value of $x$ is (Nearest integer) $\left(m_e=9 \times 10^{-31} \mathrm{~kg}\right)$

A

2

B

4

C

5

D

6

2
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
If $n, l$ represent the principal and azimuthal quantum numbers respectively, the formula used to know the number of radial nodes possible for a given orbital is
A
$(n-l)$
B
$(n-l+1)$
C
$(n-l-1)$
D
$(n-2)$
3
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
If the radius of first orbit of hydrogen like ion is $1.763 \times 10^{-2} \mathrm{~nm}$, the energy associated with that orbit (in J ) is
A
$+1.962 \times 10^{-17}$
B
$-1.962 \times 10^{-17}$
C
$-0.872 \times 10^{-17}$
D
$-2.18 \times 10^{-18}$
4
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The wavelength of an electron is $10^{3} \mathrm{~nm}$. What is its momentum in $\mathrm{kg} \mathrm{ms}^{-1}$ ? ( $\left.h=6.625 \times 10^{-34} \mathrm{Js}\right)$
A
$6.625 \times 10^{-31}$
B
$6.625 \times 10^{-37}$
C
$6.625 \times 10^{-28}$
D
$6.625 \times 10^{-34}$
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