NEET 2024 Physics Questions

A bob is suspended by a light string from the roof of a truck. The truck, initially stationary, suddenly moves to the right with acceleration a. The pendulum will tilt:

Two bodies A and B of the same mass undergo a completely inelastic one-dimensional collision. A moves with velocity v₁ while B is at rest before the collision. The velocity of the combined system after collision is v₂. The ratio v₁ : v₂ is:

An object flying in air with velocity (20î + 25ĵ + 12k̂) suddenly breaks into two pieces whose masses are in the ratio 1 : 5. The smaller mass flies off with a velocity (100î + 35ĵ + 8k̂). The velocity of the larger piece will be:

A horizontal force of 10 N is applied to block A, which is in contact with and pushes block B on a frictionless horizontal surface. The masses of A and B are 2 kg and 3 kg respectively. The force exerted by block A on block B is:

A bob is whirled in a horizontal circle by a string at an initial angular speed ω, and the tension in the string is T. If the angular speed becomes 2ω at the same radius, the tension becomes:

A body of mass m is kept on a rough horizontal surface (coefficient of friction μ). A horizontal force is applied but the body does not move. The magnitude of the resultant F of the normal reaction and the frictional force satisfies:

A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time t₁ if the elevator is at rest, and in time t₂ if the elevator is moving uniformly. Then:

A force defined by F = αt + βt² acts on a particle at a given time t. The factor which is dimensionless, if α and β are constants, is:

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

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

The values of Cp/Cv for hydrogen, helium and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode) are respectively equal to:

The volume occupied by 1.8 g of water vapour at 374 °C and 1 bar pressure will be: [Use R = 0.083 bar L K⁻¹ mol⁻¹]

The following graph represents the T–V curves of an ideal gas (where T is the temperature and V the volume) at three pressures P₁, P₂ and P₃, compared with those of Charles's law represented as dotted lines. Then the correct relation is:

Two bodies A and B of the same mass undergo a completely inelastic one-dimensional collision. Body A moves with velocity v₁ while body B is at rest before the collision. The velocity of the system after collision is v₂. The ratio v₁:v₂ is

At any instant of time t, the displacement of a particle is given by x=2t-1 (SI units), under the influence of a force of 5 N. The value of the instantaneous power is (in SI units)

A metallic bar of Young's modulus 0.5 × 10¹¹ N m⁻² and coefficient of linear thermal expansion 10⁻⁵ °C⁻¹, length 1 m and area of cross-section 10⁻³ m² is heated from 0 °C to 100 °C without expansion or bending. The compressive force developed in it is:

The maximum elongation of a steel wire of 1 m length if the elastic limit of steel and its Young's modulus respectively are 8 × 10⁸ N m⁻² and 2 × 10¹¹ N m⁻², is

If x = 5 sin(πt + π/3) m represents the motion of a particle executing simple harmonic motion, then the amplitude and time period of the motion, respectively, are

If the mass of the bob of 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 (x/2) times its original time period. The value of x is

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

The mass of a planet is 1/10th that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is:

The velocity (v)-time (t) graph of a body moving in a straight line is shown. Which of the following acceleration (a)-time (t) graphs best represents the motion?

The moment of inertia of a thin rod about an axis through its mid-point and perpendicular to its length is 2400 g·cm². The length of the 400 g rod is nearly:

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

A metallic bar (Young's modulus Y = 0.5 × 10¹¹ N m⁻², coefficient of linear expansion α = 10⁻⁵ °C⁻¹, length 1 m, area of cross-section 10⁻³ m²) is heated from 0 °C to 100 °C while clamped so it cannot expand or bend. The compressive force developed in it is:

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

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If the surface tension of water is 0.07 N m⁻¹, then the excess force required to take it away from the surface is:

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

Assertion A: The potential (V) at any axial point, at 2m distance (r) from the centre of the dipole of dipole moment vector P of magnitude 4 × 10⁻⁶ Cm, is ±9 × 10³ V (Take 1/4πε₀ = 9 × 10⁹ SI units). Reason R: V = ±2P/(4πε₀ r²), where r is the distance of any axial point situated at 2m from the centre of the dipole.

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 1/4πε₀ = 9 × 10⁹ SI units).

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 potential remains the same. E. The product of charge and voltage increases. Choose the most appropriate answer.

Choose the correct circuit which can achieve the bridge balance. (Arms 100 $\Omega$, 10 $\Omega$, 15 $\Omega$, 5 $\Omega$ with galvanometer G and cell E + key K.)

A wire of resistance 100 $\Omega$ is divided into 10 equal parts. The first 5 are connected in series, the next 5 in parallel; the two combinations are then in series. The resistance of the final combination is:

The terminal voltage of a battery of emf 10 V and internal resistance 1 $\Omega$, connected to an external resistance of 4 $\Omega$, is:

Two heaters A and B rated 1 kW and 2 kW are connected first in series and then in parallel to a fixed source. The ratio of power outputs (series : parallel) is:

In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds. The moment of inertia of the needle is 9.8 × 10⁻⁶ kg m². If the magnetic moment of the needle is x × 10⁻⁵ A m², the value of x is:

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° with each other. The magnetic moment of this new magnet is:

Match List-I with List-II: List-I (Material) A. Diamagnetic B. Ferromagnetic C. Paramagnetic D. Non-magnetic List-II (Susceptibility χ) I. χ = 0 II. 0 > χ ≥ −1 III. χ >> 1 IV. 0 < χ < ε (a small positive number) Choose the correct answer:

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 velocity if it is conducting D. move the sheet away from the pole with uniform velocity if it is both non-conducting and non-polar Choose the correct statement(s):

A logic circuit provides the output Y as per the following truth table: A B Y 0 0 1 0 1 0 1 0 1 1 1 0 The expression for the output Y is:

Consider the following statements A and B and identify the correct answer: A. For a solar cell, the I-V characteristic lies in the IV (fourth) quadrant of the given graph. B. In a reverse biased p-n junction diode, the current measured in μA is due to majority charge carriers.

The output (Y) of the given logic gate is similar to the output of an/a:

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 of the above statements, choose the most appropriate answer from the options given below:

Match List I with List II: List I (Spectral Lines of Hydrogen for transitions from) (A) n₂ = 3 to n₁ = 2 (B) n₂ = 4 to n₁ = 2 (C) n₂ = 5 to n₁ = 2 (D) n₂ = 6 to n₁ = 2 List II (Wavelengths (nm)) (I) 410.2 (II) 434.1 (III) 656.3 (IV) 486.1 Choose the correct answer from the options given below:

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

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

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,

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

A small telescope has an objective of focal length 140 cm and an eyepiece of focal length 5.0 cm. The magnifying power of the 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° as shown in the figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is:

In an ideal transformer, the turns ratio is N_p/N_s = 1/2. The ratio V_s : V_p is equal to (the symbols carry their usual meaning):

A 10 μF capacitor is connected to a 210 V, 50 Hz source as shown in figure. The peak current in the circuit is nearly (π = 3.14):

If c is the velocity of light in free space, the correct statements about a photon among the following are: A. The energy of a photon is E = hν. B. The velocity of a photon is c. C. The momentum of a photon, p = hν/c. D. In a photon–electron collision, both total energy and total momentum are conserved. E. A photon possesses positive charge. Choose the correct answer from the options given below:

The graph which shows the variation of (1/λ)² and the kinetic energy E of a free particle (where λ is the de Broglie wavelength of the particle) is:

A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as 4π × 10⁻⁷ SI units):

In the above diagram, 1 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: