AP EAPCET 2022 - 4th July Morning Shift | Atoms and Nuclei Question 17 | Physics

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) $$\sim 10 \mathrm{~eV}$$ (b) 13.6 eV

(a) $$\sim 12 \mathrm{~eV}$$, (b) 13.6 eV

(a) $$\sim 12 \mathrm{~eV}$$, (b) 10.6 eV

(a) $$\sim 8 \mathrm{~eV}$$, (b) 13.6 eV

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-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 straight line

A circle of radius R

A parabola

An ellipse

AP EAPCET 2021 - 20th August Morning Shift

MCQ (Single Correct Answer)

-0

The angular momentum of the orbital electron is integral multiple of

$$h$$

$$2\pi h$$

$$\frac{h}{2\pi}$$

$$3\pi h$$

AP EAPCET 2021 - 20th August Morning Shift

MCQ (Single Correct Answer)

-0

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

$$5 \times 10^5 \mathrm{~kgm}^{-3}$$

$$9 \times 10^{10} \mathrm{~kgm}^{-3}$$

$$3 \times 10^{21} \mathrm{~kgm}^{-3}$$

$$2 \times 10^{17} \mathrm{~kgm}^{-3}$$

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