1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In hydrogen emission spectrum, for any series, the principal quantum number is $n$. Corresponding maximum wavelength $\lambda$ is ( $R=$ Rydberg's constant)

A
$\frac{R(2 n+1)}{n^2(n+1)}$
B
$\frac{n^2(n+1)^2}{R(2 n+1)}$
C
$\frac{n^2(n+1)}{R(2 n+1)}$
D
$\frac{R(2 n+1)}{n^2(n+1)^2}$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

$\left[\mathrm{L}^2 \mathrm{M}^1 \mathrm{~T}^{-2}\right]$ are the dimensions of

A
torque
B
force
C
angular acceleration
D
angular momentum
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For formation of beats, two sound notes must have

A
different amplitudes and different frequencies
B
exactly equal frequencies only
C
exactly equal amplitudes only
D
nearly equal frequencies and equal amplitudes
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the radius of the circular path and frequency of revolution of a particle of mass $m$ are doubled, then the change in its kinetic energy will be $\left(E_i\right.$ and $E_1$ are the initial and final kinetic energies of the particle respectively,)

A
12 $E_f$
B
13 $E_i$
C
8 $E_f$
D
15 $E_i$
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