1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The gyromagnetic ratio of an electron in an hydrogen atom, according to Bohr model is

A
decreases with the quantum number 'n'.
B
independent of which orbit it is in.
C
negative
D
positive
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body performs S.H.M. under the action of force '$$\mathrm{F}_1$$' with period '$$\mathrm{T}_1$$' second. If the force is changed to '$$\mathrm{F}_2$$' it performs S.H.M. with period '$$\mathrm{T_2}$$' second. If both forces '$$\mathrm{F_1}$$' and '$$\mathrm{F_2}$$' act simultaneously in the same direction on the body, the period in second will be

A
$$\frac{T_1+T_2}{T_1 T_2}$$
B
$$\frac{T_1^2+T_2^2}{T_1 T_2}$$
C
$$\frac{\mathrm{T}_1 \mathrm{~T}_2}{\sqrt{\mathrm{T}_1^2+\mathrm{T}_2^2}}$$
D
$$\frac{T_1 T_2}{T_1+T_2}$$
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Beats are produced by waves $$\mathrm{y_1=a\sin2000\pi t}$$ and $$\mathrm{y_2=a\sin2008\pi t}$$. The number of beats heard per second is

A
4
B
1
C
zero
D
8
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment, the intensity at a point where the path difference is $$\frac{\lambda}{4}$$ [ $$\lambda$$ is wavelength of light used] is '$$\mathrm{I}$$'. If '$$\mathrm{I}_0$$' is the maximum intensity then $$\frac{\mathrm{I}}{\mathrm{I}_0}$$ is equal to $$\left[\cos \frac{\pi}{4}=\sin \frac{\pi}{4}=\frac{1}{\sqrt{2}}\right]$$

A
3 : 2
B
2 : 3
C
3 : 4
D
1 : 2
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