A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is $$v$$ in the direction shown, which one of the following options is correct ($$P$$ and $$Q$$ are any highest and lowest points on the wheel, respectively)?

 1 Point $$P$$ moves faster than point $$Q$$. 2 Both the points $$P$$ and $$Q$$ move with equal speed. 3 Point $$P$$ has zero speed. 4 Point $$P$$ moves slower than point $$Q$$.
Subtopic:  Rolling Motion (OLD NCERT) |
52%
From NCERT
NEET - 2024
Hints

Match List I with List II.
 List I (Spectral Lines of Hydrogen for transitions from) List II (Wavelength (nm)) $$\mathrm{A.}$$ $$n_2=3$$  to $$n_1=2$$ $$\mathrm{I.}$$ $$410.2$$ $$\mathrm{B.}$$ $$n_2=4$$  to $$n_1=2$$ $$\mathrm{II.}$$ $$434.1$$ $$\mathrm{C.}$$ $$n_2=5$$  to $$n_1=2$$ $$\mathrm{III.}$$ $$656.3$$ $$\mathrm{D.}$$ $$n_2=6$$ to $$n_1=2$$ $$\mathrm{IV.}$$ $$486.1$$

Choose the correct answer from the options given below:
 1 $$\mathrm{A - III, B - IV, C - II, D - I}$$ 2 $$\mathrm{A - IV, B - III, C - I, D - II}$$ 3 $$\mathrm{A - I, B - II, C - III, D - IV}$$ 4 $$\mathrm{A - II, B - I, C - IV, D - III}$$
Subtopic:  Spectral Series |
57%
From NCERT
NEET - 2024
Hints

A thermodynamic system is taken through the cycle $$abcda$$. The work done by the gas along the path $$bc$$ is:

1. $$30~\text J$$
2. $$-90~\text J$$
3. $$-60~\text J$$
4. zero
Subtopic:  Work Done by a Gas |
68%
From NCERT
NEET - 2024
Hints

The terminal voltage of the battery, whose emf is $$10~\text V$$ and internal resistance  $$1~\Omega,$$ when connected through an external resistance of $$4~\Omega$$ as shown in the figure is:

1. $$6~\text V$$
2. $$8~\text V$$
3. $$10~\text V$$
4. $$4~\text V$$
Subtopic:  EMF & Terminal Voltage |
65%
From NCERT
NEET - 2024
Hints

In an ideal transformer, the turns ratio is $$\cfrac{N_p}{N_s}=\cfrac{1}{2} .$$ The ratio $$V_s:V_p$$ is equal to (the symbols carry their usual meaning):
1. $$2:1$$
2. $$1:1$$
3. $$1:4$$
4. $$1:2$$
Subtopic:  Transformer |
64%
From NCERT
NEET - 2024
Hints

A light ray enters through a right-angled prism at point $$P$$ with the angle of incidence $$30^\circ$$ as shown in figure. It travels through the prism parallel to its base $$BC$$ and emerges along the face $$AC$$. The refractive index of the prism is:

1. $${\dfrac{\sqrt5}{2}}$$
2. $${\dfrac{\sqrt3}{4}}$$
3. $${\dfrac{\sqrt3}{2}}$$
4. $${\dfrac{\sqrt5}{4}}$$
Subtopic:  Prisms |
From NCERT
NEET - 2024
Hints

The quantities which have the same dimensions as those of solid angle are:
1. stress and angle
2. strain and arc
3. angular speed and stress
4. strain and angle
Subtopic:  Dimensions |
63%
From NCERT
NEET - 2024
Hints

A thin flat circular disc of radius $$4.5~\text {cm}$$ is placed gently over the surface of water. If surface tension of water is $$0.07~\text{Nm}^{-1},$$ then the excess force required to take it away from the surface is:
1. $$198~\text{N}$$
2. $$1.98~\text{mN}$$
3. $$99~\text{N}$$
4. $$19.8~\text{mN}$$
Subtopic:  Surface Tension |
From NCERT
NEET - 2024
Hints

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
 Assertion (A): The potential $$(V)$$ at any axial point, at $$2~\text m$$  distance ($$r$$) from the centre of the dipole of dipole moment vector $$\vec P$$ of magnitude, $$4\times10^{-6}~\text{C m},$$ is $$\pm9\times10^3~\text{V}.$$ (Take $${\dfrac{1}{4\pi\varepsilon_0}}=9\times10^9$$ SI units) Reason (R): $$V=\pm{\dfrac{2P}{4\pi\varepsilon_0r^2}},$$ where $$r$$ is the distance of any axial point situated at $$2~\text m$$ from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below:
 1 Both (A) and (R) are True and (R) is not the correct explanation of (A). 2 (A) is True but (R) is False. 3 (A) is False but (R) is True. 4 Both (A) and (R) are True and (R) is the correct explanation of (A).
Subtopic:  Electric Potential |
51%
From NCERT
NEET - 2024
Hints

In a uniform magnetic field of $$0.049~\text T$$, a magnetic needle performs $$20$$ complete oscillations in $$5$$ seconds as shown. The moment of inertia of the needle is $$9.8 × 10^{-6} ~\text{kg m}^2$$. If the magnitude of magnetic moment of the needle is $$x \times 10^{-5 }~\text {Am}^2;$$ then the value of '$$x$$' is:

1. $$128\pi^2$$
2.  $$50\pi^2$$
3. $$1280\pi^2$$
4. $$5\pi^2$$
Subtopic:  Bar Magnet |
From NCERT
NEET - 2024