MHT CET 2020 16th October Evening Shift | Atoms and Nuclei Question 84 | Physics

The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) second to first energy level and (ii) highest energy level to second level is respectively

$$2.5: 1$$

$$3: 1$$

$$2: 1$$

$$4: 1$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

-0

Using Bohr's quantisation condition, what is the rotational energy in the second orbit for a diatomic molecule? ($$I=$$ moment of inertia of diatomic molecule and, $$h=$$ Planck's constant)

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

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

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

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

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

-0

The ratio of speed of an electron in the ground state in the Bohr's first orbit of hydrogen atom to velocity of light $$(c)$$ is ( $$h=$$ Planck's constant, $$\varepsilon_0=$$ permittivity of free space, $$e=$$ charge on electron)

$$\frac{2 \theta^2 \varepsilon_0}{h c}$$

$$\frac{e^3}{2 \varepsilon_0 h c}$$

$$\frac{e^2}{2 \varepsilon_0 h c}$$

$$\frac{2 \varepsilon_0 h c}{e^2}$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

-0

The force acting on the electrons in hydrogen atom (Bohr's theory) is related to the principle quantum number $$n$$ as

$$n^{-4}$$

$$n^4$$

$$n^{-2}$$

$$n^2$$

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