1
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If ' $\lambda_1$ ' and ' $\lambda_2$ ' are the wavelengths of the first line of the Lyman and Paschen series respectively, then $\lambda_2: \lambda_1$ is

A
$3: 1$
B
$30: 1$
C
$50: 7$
D
$108: 7$
2
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

An electric dipole of moment $\overrightarrow{\mathrm{p}}$ is lying along a uniform electric field $\overrightarrow{\mathrm{E}}$. The work done in rotating the dipole through $\frac{\pi^{\mathrm{c}}}{3}$ is $\left[\sin 30^{\circ}=\cos 60^{\circ}=0 \cdot 5, \cos 30^{\circ}=\sin 60^{\circ}=\sqrt{3} / 2\right]$

A
3 pE
B
$\sqrt{2} \mathrm{pE}$
C
pE
D
$\frac{\mathrm{pE}}{2}$
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