1
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Which physical quantity is measured in barn?
A
Radius of the nuclei
B
Pressure in a liquid drop
C
Scattering cross-section
D
Rate of flow of liquid
2
AP EAPCET 2024 - 22th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of minimum wavelength of Balmer series to maximum wavelength in Brackett series in hydrogen spectrum is

A
$25: 16$
B
$4: 36$
C
$9: 100$
D
$100: 9$
3
AP EAPCET 2024 - 22th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The half-life period of a radioactive element $A$ is 62 years. It decays into another stable element $B$. An archaeologist found a sample in which $A$ and $B$ are in 1:15 ratio. The age of the sample is

A
248 years
B
186 years
C
124 years
D
310 years
4
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The electrostatic potential energy of the electron in an orbit of hydrogen is -6.8 eV . The speed of the electron in this orbit is ( $c$ is speed of light in vacuum)
A
$\frac{c}{137}$
B
$\frac{c}{274}$
C
$\frac{2 c}{137}$
D
$\frac{3 c}{137}$
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