List of top Physics Questions asked in NEET (UG)

A sample of $0.1\,g$ of water at $100^{\circ}C $ and normal pressure $(1.013 \times 10^5 \, Nm^{ -2})$ requires $54\,cal$ of heat energy to convert to steam at $100^{\circ}C $. If the volume of the steam produced is $167.1\, cc$, the change in internal energy of the sample, is
The power radiated by a black body is $P$ and it radiates maximum energy at wavelength, $\lambda_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\frac{3}{4} \lambda_0$ , the power radiated by it becomes $nP$. The value of $n$ is
The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is $30^{\circ}$. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
An electron of mass $m$ with an initial velocity $\vec{V} = V_0 \hat{i} (V_0 > 0)$ enters an electric field $\vec{E} = - E_0 \hat{i} (E_0 = \text{constant } > 0)$ at $t = 0$. If $\lambda_o$ is its de-Broglie wavelength initially,. then its de-Broglie wavelength at time $t$ is
The magnetic potential energy stored in a certain inductor is $25 \,mJ,$ when the current in the inductor is $60\, mA$ This inductor is of inductance
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere ?
Which one of the following statements is incorrect ?
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt : (Kt + Kr) for the sphere is
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are KA , KB and KC , respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
The kinetic energies of a planet in an elliptical orbit
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct ?
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to
A body initially at rest and sliding along a frictionless track
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field \(\overrightarrow{E}\) . Due to the force q\(\overrightarrow{E}\), its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively
A block of mass m is placed on a smooth inclined wedge ABC of inclination θ as shown in the figure. The wedge is given an acceleration ‘a’ towards the right. The relation between a and θ for the block to remain stationary on the wedge is
The relation between a and θ for the block to remain stationary
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
A toy car with charge $q$ moves on a frictionless horizontal plane surface under the influence of a uniform electric field $E$ . Due to the force $q\,\vec{E}$ , its velocity increases from $0 \,to\, 6 m/s^{-1}$ in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between $0 \,to\, 3$ seconds are respectively
A small sphere of radius $'r'$ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are KA, KB and KC, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then

An object is placed at a distance of $40\, cm$ from a concave mirror of focal length $15\, cm$. If the object is displaced through a distance of $20\, cm$ towards the mirror, the displacement of the image will be
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is $20 \, m/s^{-2}$ at a distance of $5 \,m$ from the mean position. The time period of oscillation is
An inductor $20\, mH$, a capacitor $100\, \mu F$ and a resistor $50 \, \Omega$ are connected in series across a source of emf, $V\, = \,10 \,sin\, 314\, t$. The power loss in the circuit is
A carbon resistor of $(47 \pm 4.7) \, k \Omega$ is to be marked with rings of different colours for its identification. The colour code sequence will be

A set of ‘n’ equal resistors, of value \('R'\) each, are connected in series to a battery of emf ‘E’ and internal resistance ‘R' The current drawn is \(I\) . Now, the ‘n’ resistors are connected in parallel to the same battery. Then the current drawn from the battery becomes \(10 \,I\) . The value of ‘n’ is

A student measured the diameter of a small steel ball using a screw gauge of least count $0.001\, cm$. The main scale reading is $5\, mm$ and zero of circular scale division coincides with $25$ divisions above the reference level. If screw gauge has a zero error of - $0.004\, cm$, the correct diameter of the ball is
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of