1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

A $$1 \mathrm{~kg}$$ object strikes a wall with velocity $$1 \mathrm{~m} \mathrm{~s}^{-1}$$ at an angle of $$60^{\circ}$$ with the wall and reflects at the same angle. If it remains in contact with wall for $$0.1 \mathrm{~s}$$, then the force exerted on the wall is :

A
$$30 \sqrt{3} \mathrm{~N}$$
B
Zero
C
$$10 \sqrt{3} \mathrm{~N}$$
D
$$20 \sqrt{3} \mathrm{~N}$$
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The angular momentum of an electron moving in an orbit of hydrogen atom is $$\mathrm{1.5\left(\frac{h}{\pi}\right)}$$. The energy in the same orbit is nearly.

A
$$-1.5$$ eV
B
$$-1.6$$ eV
C
$$-1.3$$ eV
D
$$-1.4$$ eV
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

A particle is executing uniform circular motion with velocity $$\vec{v}$$ and acceleration $$\vec{a}$$. Which of the following is true?

A
$$\vec{v}$$ is a constant; $$\vec{a}$$ is not a constant
B
$$\vec{v}$$ is not a constant; $$\vec{a}$$ is not a constant
C
$$\vec{v}$$ is a constant; $$\vec{a}$$ is a constant
D
$$\vec{v}$$ is not a constant; $$\vec{a}$$ is a constant
4
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

A simple pendulum oscillating in air has a period of $$\sqrt{3} \mathrm{~s}$$. If it is completely immersed in non-viscous liquid, having density $$\left(\frac{1}{4}\right)^{\text {th }}$$ of the material of the bob, the new period will be :-

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