List of top Physics Questions asked in NEET (UG)

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass $1\, kg$ moves with a speed of $12 \, ms^{-1}$ and the second part of mass $2 \,kg$ moves with $8 \, ms^{-1}$ speed. If the third part files off with $4 \, ms^{-1}$ speed, then its mass is :

In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is

Two sources of sound placed close to each other, are emitting progressive waves given by $y _{1}=4 \sin 600\, \pi t$ and $y _{2}=5 \sin 608\, \pi t :$ An observer located near these two sources of sound will hear

A car of mass m is moving on a level circular track of radius R.If $\mu_s$ represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by

If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by $0.5 \%. $ The initial momentum of electron will be

When a biconvex lens of glass having refractive index $1.47$ is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index

In the circuit shown the cells A and B have negligible resistances. For $V_A =12\, V,\, R_1 =500\, \Omega $ and $ R =100\, \Omega $ the galvanometer (G) shows no deflection. The value of $V_B$ is

The input resistan ce o f a silicon transistor is $100 \,\Omega$ B a se current is changed by $40 \,\mu A$ which results in a change in collector currently by $2 \,m A$ . This transistor is used as a comm on emitter amplifier with a load resistance o f $4 \,k\Omega$ The voltage gain o f the amplifier is

The magnifying power of a telescope is $9.$ When it is adjusted for parallel rays the distance between the objective and eyepiece is $20\, cm.$ The focal length of lenses are

The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are

The motion of a particle along a straight line is described by equation $ x = 8 + 12t - t^3 $ where $x$ is in metre and $t$ in second. The retardation of the particle when its velocity becomes zero is

A mixture consists of two radioactive materials $ A_1$ and $A_2$ with half lives of $20\,s$ and $10\, s$ respectively. Initially the mixture has $40 \,g$ of $A_1$ and $160 \,g$ of $A_2$ The amount of the two in the mixture will become equal after

If the radius of a star is $R$ and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is $ Q ? $ ($ \sigma $ stands for Stefan's constant)

Two persons of masses $55\, kg$ and $65\, kg$ respectively, are at the opposite ends of a boat. The length of the boat is $30\,. m$ and weighs $100\, kg$. The $55\, kg$ man walks up to the $65\, kg$ man and sits with him. If the boat is in still water the center of mass of the system shift by:

What is the flux through a cube of side a if a point charge of q is at one of its corner?

Two metallic spheres of radii 1 cm and 3 cm are are given charges of $ -1 \times 10^{-2} C $ and $5 \times 10^{-2} C $ , respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is

The instantaneous values of alternating current and voltages in a circuit are given as $i=\frac{1}{\sqrt2}\sin(100\pi t)$ ampere $e=\frac{1}{\sqrt2}\sin(100\pi t+\frac{\pi}{3})$ Volt . The average power in watts consumed in the circuit is

The dimension of $\left(\mu_{0} \in_{0}\right)^{-1 / 2}$ are :

A solid cylinder of mass $3\, kg$ is rolling on a horizontal surface with velocity $4\, ms^{-1}$. It collides with a horizontal spring of force constant $200\, N\, m^{-1}$. The maximum compression produced in the spring will be

A $200\, W$ sodium street lamp emits yellow light of wavelength $0.6 \, \mu m. $ Assuming it to be $25 \% $ efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is

A car of mass $1000 \,kg$ negotiates a banked curve of radius $90\,m$ on a frictionless road. If the banking angle is $45^{\circ}$, the speed of the car is

Two similar coils of radius $R$ are lying concentrically with their planes at right angles to each other. The currents flowing in them are $I$ and $2I$, respectively. The resultant magnetic field induction at the centre will be

Two spheres $A$ and $B$ of masses $m_1$ and $m_2$ respectively collide. $A$ is at rest initially and $B$ is moving with velocity $v/2$ along x-axis. After collision $B$ has a velocity in a direction perpendicular to the original direction. The mass $A$ moves after collision in the direction

$C$ and $Si$ both have same lattice structure; having $4$ bonding electrons in each. However, $C$ is insulator where as $Si$ is intrinsic semiconductor. This is because

A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the eneigy stored in the capacitor is