AP EAPCET 2022 - 5th July Morning Shift | Atoms and Nuclei Question 20 | Physics

An electron in the hydrogen atom excites from 2nd orbit to 4th orbit then the change in angular momentum of the electron is (Planck's constant $$h=6.64 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$)

$$2.11 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$1.05 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$0.57 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

$$422 \times 10^{-34} \mathrm{~J}-\mathrm{s}$$

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

-0

Choose the correct statement of the following

The nuclear density in general, is independent of mass number A.

The radius of nucleus is directly proportional to the mass number of A of the nucleus.

The binding energy of a nucleus is inversely proportional to its mass defect.

Energy is observed when heavy nuclei undergo transmutation into light nuclei.

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

-0

A ancient discovery found a sample, where $$75 \%$$ of the original carbon ($$\mathrm{C}^{14}$$) remains. Then the age of the sample is $$\binom{T_{\frac{1}{2}}\left(C^{14}\right)=5730 \text { years, } \ln 0.5=-0.7}{\ln (0.75)=-0.3} $$

2300 years

2456 years

2546 years

3456 years

AP EAPCET 2022 - 4th July Evening Shift

MCQ (Single Correct Answer)

-0

A hydrogen atom at the ground level absorbs a photon and is excited n = 4 level. The potential energy of the electron in the excited state is

$$-$$0.85 eV

$$+$$0.85 eV

$$-$$1.7 eV

$$+$$1.7 eV

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