1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$2.5: 1$$
B
$$3: 1$$
C
$$2: 1$$
D
$$4: 1$$
2
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-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)

A
$$\frac{h}{2 I \pi^2}$$
B
$$\frac{h^2}{2 I \pi^2}$$
C
$$\frac{h^2}{2 I^2 \pi^2}$$
D
$$\frac{h}{2 I^2 \pi}$$
3
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-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)

A
$$\frac{2 \theta^2 \varepsilon_0}{h c}$$
B
$$\frac{e^3}{2 \varepsilon_0 h c}$$
C
$$\frac{e^2}{2 \varepsilon_0 h c}$$
D
$$\frac{2 \varepsilon_0 h c}{e^2}$$
4
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$n^{-4}$$
B
$$n^4$$
C
$$n^{-2}$$
D
$$n^2$$
MHT CET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12