1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The radius of an atomic nucleus of mass number 64 is 4.8 fermi. Then the mass number of another atomic nucleus of radius 6 fermi is

A
64
B
81
C
100
D
125
2
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Energy of a stationary electron in the hydrogen atom is $$E=\frac{13.6}{n^2} \mathrm{~eV}$$, then the energies required to excite the electron in hydrogen atom to (a) its second excited state and (b) ionised state, respectively.

A
(a) $$\sim 10 \mathrm{~eV}$$ (b) 13.6 eV
B
(a) $$\sim 12 \mathrm{~eV}$$, (b) 13.6 eV
C
(a) $$\sim 12 \mathrm{~eV}$$, (b) 10.6 eV
D
(a) $$\sim 8 \mathrm{~eV}$$, (b) 13.6 eV
3
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The graph of $$\ln \left(\frac{R}{R_0}\right)$$ versus $\ln A$ is where $$R$$ is radius of a nucleus, $$A$$ is its mass number, and $$R_0$$ is constant

A
A straight line
B
A circle of radius R
C
A parabola
D
An ellipse
4
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The angular momentum of the orbital electron is integral multiple of

A
$$h$$
B
$$2\pi h$$
C
$$\frac{h}{2\pi}$$
D
$$3\pi h$$
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