1
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Balmer series, wavelength of first line is ' $\lambda_1$ ' and in Brackett series wavelength of first line is ' $\lambda_2$ ' then $\frac{\lambda_1}{\lambda_2}$ is

A
0.162
B
0.124
C
0.138
D
0.188
2
MHT CET 2019 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Bohr model is applied to a particle of mass ' $m$ ' and charge ' $q$ ' is moving in a plane under the influence of a transverse magnetic field ' $B$ '. The energy of the charged particle in the $n$th level will be ( $h=$ Planck's constant)

A
$2 n h q B / \pi \mathrm{m}$
B
$n h q B / 2 \pi \mathrm{~m}$
C
$n h q B / 4 \pi \mathrm{~m}$
D
$n h q B / \pi \mathrm{m}$
3
MHT CET 2019 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The angle made by orbital angular momentum of electron with the direction of the orbital magnetic moment is

A
$120^{\circ}$
B
$60^{\circ}$
C
$180^{\circ}$
D
$90^{\circ}$
4
MHT CET 2019 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The wavelength of the first line in Balmer series in the hydrogen spectrum is ' $\lambda$ '. What is the wavelength of the second line in the same series?

A
$\frac{20}{27} \lambda$
B
$\frac{3}{16} \lambda$
C
$\frac{5}{36} \lambda$
D
$\frac{3}{4} \lambda$
MHT CET Subjects
EXAM MAP