List of top Physics Questions asked in NEET (UG)

A bar magnet having a magnetic movement of $2 \times 10^{4} JT ^{-1}$ is free to rotate in a horizontal plane. A horizontal magnetic field $B =6 \times 10^{-4}$ T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction $60^{\circ}$ from the field is :
A student measures the terminal potential difference (V) of a cell (of emf $\varepsilon $ and internal resistance r) as a function of the current $(I)$ flowing through it. The slope, and intercept, of the graph between V and I, then, respectively, equal
The mass of a lift is $2000\, kg.$ When the tension in the supporting cable is $28000\, N,$ then its acceleration is
Each of the two strings of length $51.6\, cm$ and $49.1\, cm$ are tensioned separately by $20\, N$ force. Mass per unit length of both the strings is same and equal to $1\, g / m$. When both the strings vibrate simultaneously the number of beats is :
A galvanometer having a coil resistance of $60\, \Omega$ shows full scale deflection when a current of $1.0\, amp$ passes through it. It can be converted into an ammeter to read currents upto $5.0\, amp$ by
In a Rutherford scattering experiment when a projectile of charge $Z _{1}$ and mass $M _{1}$ approaches a target nucleus of charge $Z _{2}$ and mass $M _{2}$, the distance of closest approach is $r _{0}$. The energy of the projectile is :
A bus is moving with a speed of $ 10 \,ms^{-1} $ on a straight road. A scooterist wishes to overtake the bus in $ 100 \,s $ . If the bus is at a distance of $ 1 \,km $ from the scooterist with what speed should the scooterist chase the bus ?
A rectangular, a square, a circular and an elliptical loop, all in the $( x - y )$ plane, are moving out of a uniform magnetic field with a constant velocity, $\overrightarrow{ V }= v \cdot \hat{ i }$. The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, come out of the field region, will not remain constant for:
A wire of resistance $12$ ohms per meter is bent to form a complete circle of radius $10 \,cm$. The resistance between its two diametrically opposite points, $A$ and $B$ as shown in the figure is
A block of mass $M$ is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value $k$. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be
The electric potential at a point $(x. y, z)$ is given by $ V = - x^2 y - xz^2 + 4 $ The electric field at that point is
If $\vec{F}$ is the force acting on a particle having position vector $\vec{r}$ and $\vec{\tau}$ be the torque of this force about the origin, then
Four identical thin rods each of mass M and length $l$, form a square frame. Moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is
An explosion blows a rock into three parts Two parts go off at right angles to each other. These two are, $1\, kg$ first part moving with a velocity of $12\, ms ^{-1}$ and $2\, kg$ second part moving with a velocity of $8\, ms ^{-1}$. If the thirds part files off with a velocity of $4\, ms ^{-1}$, its mass would be :
A wave in a string has an amplitude of $2\, cm$. The wave travels in the +ve direction of $x$ -axis with a speed of $128\, m / s$ and it is noted that 5 complete waves fit in $4\, m$ length of the string. The equation describing the wave is
A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4 \times 10^{-3}$ Wb. The self-inductance of the solenoid is
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are $F_1, F_2, $ and $ F_3$ respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is
In an a.c. circuit the emf (e) and the current (i) at any instant core given respectively by \(e = E_0 sin ωt\), \(I = I_0 sin (ωt – ɸ)\). The average power in the circuit over one cycle of a.c. is.
A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction $\frac{1}{\pi}\big(\frac{Wb}{m^2}\big)$ in such a way that its axis makes an angle of 60$^{\circ}$ with $\overrightarrow{B}$ . The magnetic flux linked with the disc is
The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}ms^{-2},$ in the third second is
A point performs simple harmonic oscillation of period T and the equation of motion is given by $x = a \sin(\omega t + \pi/6).$ After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?
Two periodic waves of intensities $I_1$ and $I_2$ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
Two radioactive materials $X_1$, and $X_2$ have decay constants 5$\lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X$_1$ to that X$_2$ will be 1/e after a time
A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of $3 \times 10^6 \, ms^{-1}. $ The velocity of the particle is (mass of electron=$9.1 \times 10^{-31} \, kg) $
Two simple harmonic motions of angular frequency 100 and 1000 rad $s^1$ have the same displacement amplitude. The ratio of their maximum acceleration is