1
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A spring has a certain mass suspended from it and its period for vertical oscillations is '$$T_1$$'. The spring is now cut in to two equal halves and the same mass is suspended from one of the halves. The period of vertical oscillations is now '$$\mathrm{T}_2$$'. The ratio $$\mathrm{T}_1 / \mathrm{T}_2$$ is

A
2
B
$$\sqrt{2}$$
C
$$\frac{1}{\sqrt{2}}$$
D
$$\frac{1}{2}$$
2
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When photons of energies twice and thrice the work function of a metal are incident on the metal surface one after other, the maximum velocities of the photoelectrons emitted in the two cases are $$\mathrm{v}_1$$ and $$\mathrm{v}_2$$ respectively. The ratio $$\mathrm{v}_1: \mathrm{v}_2$$ is

A
$$\sqrt{2}: 1$$
B
$$\sqrt{3}: 1$$
C
$$\sqrt{3}: \sqrt{2}$$
D
$$1: \sqrt{2}$$
3
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A simple pendulum of length $$2 \mathrm{~m}$$ is given a horizontal push through angular displacement of $$60^{\circ}$$. If the mass of bob is 200 gram, the angular velocity of the bob will be (Take Acceleration due to gravity $$=10 \mathrm{~m} / \mathrm{s}^2$$ ) $$\left(\sin 30^{\circ}=\cos 60^{\circ}=0.5, \cos 30^{\circ}=\sin 60^{\circ}=\sqrt{3} / 2\right)$$

A
$$2 \sqrt{2} ~\mathrm{rad} / \mathrm{s}$$
B
$$3 \sqrt{2} ~\mathrm{rad} / \mathrm{s}$$
C
$$2 \sqrt{2.5} ~\mathrm{rad} / \mathrm{s}$$
D
$$3 \sqrt{2.5} ~\mathrm{rad} / \mathrm{s}$$
4
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\mathrm{n}^4$$
B
$$\mathrm{n}^{-4}$$
C
$$\mathrm{n}^2$$
D
$$\mathrm{n}^{-2}$$
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