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

The emf of a cell having internal resistance $$1 \Omega$$ is balanced against a length of $$330 \mathrm{~cm}$$ on a potentiometer wire. When an external resistance of $$2 \Omega$$ is connected across the cell, the balancing length will be :

A
220 cm
B
330 cm
C
115 cm
D
332 cm
2
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
$$20 \sqrt{3} \mathrm{~N}$$
3
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
4
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
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