1
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The ground state energy of hydrogen atom is -13.6 eV . The potential energy of the electron in this state is
A
27.2 eV
B
-27.2 eV
C
-13.6 eV
D
13.6 eV
2
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
If the energy released per fission of a ${ }_{92}^{235} \mathrm{U}$ nucleus is 200 MeV . The energy released in the fission of 0.1 kg d ${ }_{92}^{235} \mathrm{U}$ in kilowatt - hour is
A
$22.8 \times 10^5$
B
$22.8 \times 10^7$
C
$11.4 \times 10^5$
D
$820 \times 10^{10}$
3
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Inner shell electrons in atoms moving from one energy level to another lower energy level produce
A
gamma rays
B
microwaves
C
radio waves
D
ultraviolet rays
4
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The speed of the electron in a hydrogen atom in the $n=3$ level is

(Planck's constant $=6.6 \times 10^{-34} \mathrm{Js}$ )

A
$62 \times 10^5 \mathrm{~ms}^{-1}$
B
$3.7 \times 10^5 \mathrm{~ms}^{-1}$
C
$7.3 \times 10^5 \mathrm{~ms}^{-1}$
D
$1.6 \times 10^5 \mathrm{~ms}^{-1}$
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