1
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
$$3\pi h$$
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following values is the correct order of nuclear density?

A
$$5 \times 10^5 \mathrm{~kgm}^{-3}$$
B
$$9 \times 10^{10} \mathrm{~kgm}^{-3}$$
C
$$3 \times 10^{21} \mathrm{~kgm}^{-3}$$
D
$$2 \times 10^{17} \mathrm{~kgm}^{-3}$$
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ionisation potential of hydrogen atom is 13.6 V. How much energy need to be supplied to ionise the hydrogen atom in the first excited state?

A
13.6 eV
B
27.2 eV
C
3.4 eV
D
6.8 eV
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is correct?

A
The rest mass of the stable nucleus is less than the sum of the rest masses of its separated nucleons.
B
The rest mass of the stable nucleus is greater than the sum of the rest masses of its separated nucleons.
C
In nuclear fission energy is released by fusion of two nuclei of medium mass (approximate $$100 \mathrm{~amu}$$ ).
D
In nuclear fission energy is released by fragmentation of very low atomic mass nucleus.
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