List of top Physics Questions asked in NEET (UG)

An infinitely long straight conductor carries a current of $5\, A$ as shown. An electron is moving with a speed of $10^{5} m / s$ parallel to the conductor. The perpendicular distance between the electron and the conductor is $20\, cm$ at an instant. Calculate the magnitude of the force experienced by the electron at that instant.
Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations.
Column I Column II
A Drift Velocity P $\frac{ m }{ ne ^{2} \rho}$
B Electrical Resistivity Q $ne v_{ d }$
C Relaxation Period R $\frac{ e E }{ m } \tau$
D Current Density S $\frac{ E }{ J }$
In a potentiometer circuit a cell of EMF $1.5\, V$ gives balance point at $36\, cm$ length of wire. If another cell of EMF $2.5\, V$ replaces the first cell, then at what length of the wire, the balance point occurs ?
Find the value of the angle of emergence from the prism. Refractive index of the glass is $\sqrt{3}$.
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:
A point object is placed at a distance of $60\, cm$ from a convex lens of focal length $30\, cm$. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of $40\, cm$ from it, the final image would be formed at a distance of :
The escape velocity from the Earth's surface is $v$. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is :
$A$ particle moving in a circle of radius $R$ with a uniform speed takes a time $T$ to complete one revolution. If this particle were projected with the same speed at an angle ' $\theta$ ' to the horizontal, the maximum height attained by it equals $4 R$. The angle of projection, $\theta$, is then given by :
A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : $0\, mm$ Circular scale reading : $52$ divisions Given that $1\, mm$ on main scale corresponds to $100$ divisions on the circular scale. The diameter of the wire from the above data is :
Polar molecules are the molecules:
Taking into account of the significant figures, what is the value of $9.99 \,m - 0.0099 \,m$ ?
A resistance wire connected in the left gap of a metre bridge balances a $10\, \Omega$ resistance in the right gap at a point which divides the bridge wire in the ratio $3 : 2$. If the length of the resistance wire is $1.5\,m$, then the length of 1 $\Omega$ of the resistance wire is:
A long solenoid of $50\,cm$ length having $100\,turns$ carries a current of $2.5\,A$. The magnetic field at the centre of the solenoid is : $(\mu_o = 4\pi \times 10^{-7} T\,m\,A^{-1})$
An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is $1.227 \times 10^{-2}nm$, the potential difference is :
A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to \(L_1\) when mass M is suspended from its free end. The expression for Young’s modulus is:
A ray is incident at an angle of incidence $i$ on one surface of a small angle prism(with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is $\mu$. then the angle of incidence is nearly equal to:
Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
When a uranium isotope $^{235}_92 U$ is bombarded with a neutron, it generates $^{89}_{36} Kr$, three neutrons and :
Two bodies of mass $4\,kg$ and $6\,kg$ are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :
For transistor action, which of the following statements is correct ?
Two coherent sources of light interfere and produce fringe pattern on a screen. For central maximum, the phase difference between the two waves will be
For which one of the following, Bohr model is not valid?
A wire of length $L$ metre carrying a current of $I$ ampere is bent in the form of a circle. Its magnetic moment is,
The energy required to break one bond in DNA is $10^{-20}J $. This value in eV is nearly
A ball is thrown vertically downward with a velocity of 20m/s from the top of a tower. It hits the ground after some time with a velocity of 80m/s. The height of the tower is : (g = $10m/s^2$)