NEET 2024

In an ideal transformer, the turns ratio is \(\frac{N_P}{N_S}=\frac{1}{2}\). The ratio \(V_S: V_P\) is equal to (the symbols carry their usual meaning) :

A \(10 \mu \mathrm{F}\) capacitor is connected to a \(210 \mathrm{~V}, 50 \mathrm{~Hz}\) source as shown in figure. The peak current in the circuit is nearly \((\pi=3.14)\) :

Match List I with List II:

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\({ }_{82}^{290} X \xrightarrow{\alpha} Y \xrightarrow{e^{+}} Z \xrightarrow{\beta^{-}} P \xrightarrow{e^{-}} Q\)
In the nuclear emission stated above, the mass number and atomic number of the product \(Q\) respectively, are

Given below are two statements:
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light o...

If the plates of a parallel plate capacitor connected to a battery are moved close to each other, then
A. the charge stored in it, increases.
B. the energy stored in it, decreases.
C. its capacitance increases.
D. the ratio of charge to its...

In the following circuit, the equivalent capacitance between terminal A and terminal B is :

Two bodies \(A\) and \(B\) of same mass undergo completely inelastic one dimensional collision. The body \(A\) moves with velocity \(v_1\) while body \(B\) is at rest before collision. The velocity of the system after collision is \(v_2\). ...

Two heaters \(A\) and \(B\) have power rating of \(1 \mathrm{~kW}\) and \(2 \mathrm{~kW}\), respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases i...

A wire of length '\(l\)' and resistance \(100 \Omega\) is divided into 10 equal parts. The first 5 parts are connected in series while the next 5 parts are connected in parallel. The two combinations are again connected in series. The resis...

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

Choose the correct circuit which can achieve the bridge balance.

If \(c\) is the velocity of light in free space, the correct statements about photon among the following are:
A. The energy of a photon is \(E=h v\).
B. The velocity of a photon is \(c\).
C. The momentum of a photon, \(p=\frac{h v}{c}\).
D....

The graph which shows the variation of \(\left(\frac{1}{\lambda^2}\right)\) and its kinetic energy, \(E\) is (where \(\lambda\) is de Broglie wavelength of a free particle):

The property which is not of an electromagnetic wave travelling in free space is that:

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 \(2 \mathrm{~m}\) distance \((r)\) from the centre of the dipole of dipole moment ve...

A thin spherical shell is charged by some source. The potential difference between the two points \(C\) and \(P\) (in V) shown in the figure is:
(Take \(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9\) SI units)

A small telescope has an objective of focal length \(140 \mathrm{~cm}\) and an eye piece of focal length \(5.0 \mathrm{~cm}\). The magnifying power of telescope for viewing a distant object is:

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 \(B C\) and emerges along the face \(A C\). The refractive index...

The mass of a planet is \(\frac{1}{10}\)th that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is:

The minimum energy required to launch a satellite of mass \(m\) from the surface of earth of mass \(M\) and radius \(R\) in a circular orbit at an altitude of \(2 R\) from the surface of the earth is:

A thermodynamic system is taken through the cycle \(abcda\). The work done by the gas along the path \(b c\) is:

The following graph represents the \(T\)-\(V\) curves of an ideal gas (where \(T\) is the temperature and \(V\) the volume) at three pressures \(P_1, P_2\) and \(P_3\) compared with those of Charles's law represented as dotted lines.

Then ...

A particle moving with uniform speed in a circular path maintains:

A horizontal force \(10 \mathrm{~N}\) is applied to a block \(A\) as shown in figure. The mass of blocks \(A\) and \(B\) are \(2 \mathrm{~kg}\) and 3 \(\mathrm{kg}\) respectively. The blocks slide over a frictionless surface. The force exer...

Match List I with List II

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A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to:
A. hold the sheet there if it is magnetic.
B. hold the sheet there if it is non-magnetic.
C. move the sheet away from the pole with uniform ...

In a uniform magnetic field of \(0.049 \mathrm{~T}\), a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is \(9.8 \times 10^{-6} \mathrm{~kg} \mathrm{~m}^2\). If the magnitude of m...

An iron bar of length \(L\) has magnetic moment \(M\). It is bent at the middle of its length such that the two arms make an angle \(60^{\circ}\) with each other. The magnetic moment of this new magnet is :

In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:

The velocity \((v)-\) time \((t)\) plot of the motion of a body is shown below:

The acceleration \((a)-\) time \((t)\) graph that best suits this motion is :

A tightly wound 100 turns coil of radius \(10 \mathrm{~cm}\) carries a current of \(7 \mathrm{~A}\). The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as \(4 \pi \times 10^{-7} \mathrm{SI}\) u...

A parallel plate capacitor is charged by connecting it to a battery through a resistor. If \(I\) is the current in the circuit, then in the gap between the plates:

If \(x=5 \sin \left(\pi t+\frac{\pi}{3}\right) \mathrm{m}\) represents the motion of a particle executing simple harmonic motion, the amplitude and time period of motion, respectively, are

If the mass of the bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is \(\frac{x}{2}\) times its original time period. Then the value ...

A metallic bar of Young's modulus, \(0.5 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}\) and coefficient of linear thermal expansion \(10^{-5}{ }^{\circ} \mathrm{C}^{-1}\), length \(1 \mathrm{~m}\) and area of cross-section $$10^{-3} \mathrm{...

The maximum elongation of a steel wire of \(1 \mathrm{~m}\) length if the elastic limit of steel and its Young's modulus, respectively, are \(8 \times 10^8 \mathrm{~N} \mathrm{~m}^{-2}\) and \(2 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}\)...

A thin flat circular disc of radius \(4.5 \mathrm{~cm}\) is placed gently over the surface of water. If surface tension of water is \(0.07 \mathrm{~N} \mathrm{~m}^{-1}\), then the excess force required to take it away from the surface is

The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is \(2400 \mathrm{~g} \mathrm{~cm}^2\). The length of the \(400 \mathrm{~g}\) rod is nearly:

A bob is whirled in a horizontal plane by means of a string with an initial speed of \(\omega \mathrm{~rpm}\). The tension in the string is \(T\). If speed becomes \(2 \omega\) while keeping the same radius, the tension in the string become...

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 ...

\(\text { The output ( } Y \text { ) of the given logic gate is similar to the output of an/a }\)

A logic circuit provides the output \(Y\) as per the following truth table :

The expression of the output Y is :

Consider the following statements A and B and identify the correct answer :

A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph.
B. In a reverse biased \(p n\) junction diode, the current measured in $$(...

In a vernier callipers, \((N+1)\) divisions of vernier scale coincide with \(N\) divisions of main scale. If \(1 \mathrm{~MSD}\) represents \(0.1 \mathrm{~mm}\), the vernier constant (in \(\mathrm{cm}\)) is:

The quantities which have the same dimensions as those of solid angle are:

A force defined by \(F=\alpha t^2+\beta t\) acts on a particle at a given time \(t\). The factor which is dimensionless, if \(\alpha\) and \(\beta\) are constants, is:

If the monochromatic source in Young's double slit experiment is replaced by white light, then

An unpolarised light beam strikes a glass surface at Brewster's angle. Then

At any instant of time \(t\), the displacement of any particle is given by \(2 t-1\) (\(\mathrm{SI}\) unit) under the influence of force of \(5 \mathrm{~N}\). The value of instantaneous power is (in \(\mathrm{SI}\) unit):