List of top Questions asked in NEET (UG)

A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is $\frac {\pi}{3}$ . If instead C is removed from the circuit, the phase difference is again $\frac {\pi}{3}$ between current and voltage. The power factor of the circuit is :

A short electric dipole has a dipole moment of \(16 \times 10^{-9} C\, m\). The electric potential due to the dipole at a point at a distance of \(0.6 \,m\) from the centre of the dipole, situated on a line making an angle of \(60\degree\)with the dipole axis is : \((\frac {1}{4\pi \epsilon_o}= 9 \times 10^9 N\,m^2/C^2)\)

The increase in the width of the depletion region in a p-n junction diode is due to :

Assume that light of wavelength $600\, nm$ is coming from a star. The limit of resolution of telescope whose objective has a diameter of $2\,m$ is :

The color code of a resistance is given below : The values of resistance and tolerance, respectively, are :

A spherical conductor of radius 10 cm has a charge of \(3.2 \times 10^{-7} C\) distributed uniformly. What is the magnitude of electric field at a point \(15\,cm\) from the centre of the sphere?
\((\frac {1}{4\pi \epsilon_o} = 9 \times 10^9 Nm^2/C^2)\)

The energy required to break one bond in DNA is $10^{-20}J $. This value in eV is nearly

The number of protons, neutrons and electrons in $^{175}_{71} Lu,$ respectively , are :

The angle of $1'$ (minute of arc) in radian is nearly equal to

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 :

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 : $(\mu_o = 4\pi \times 10^{-7} T\,m\,A^{-1})$

Two particles of mass $5\,kg$ and $10\,kg$ respectively are attached to the two ends of a rigid rod of length 1m with negligible mass. The centre of mass of the system from the $5\,kg$ particle is nearly at a distance of :

For the logic circuit shown, the truth table is :

A wheel with $20$ metallic spokes each $1\, m$ long is rotated with a speed of $120\, rpm$ in a plane perpendicular to a magnetic field of $0.4\, G$. The induced emf between the axle and rim of the wheel will be, $(1 G = 10^{-4}\, T)$

The mean free path for a gas, with molecular diameter $d$ and number density $n$ can be expressed as :

Taking into account of the significant figures, what is the value of $9.99 \,m - 0.0099 \,m$ ?

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 wire of length $L$ metre carrying a current of $I$ ampere is bent in the form of a circle. Its magnetic moment is,

When a uranium isotope $^{235}_92 U$ is bombarded with a neutron, it generates $^{89}_{36} Kr$, three neutrons and :

The solids which have negative temperature coefficient of resistance are :

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is : (c = speed of electromagnetic waves)

Find the torque about the origin when a force of $3 \,\hat{j}\, N$ acts on a particle whose position vector is $2\, \hat {k}\, m$ .

Three identical spheres, each of mass $M$, are placed at the corners of a right angle triangle with mutually perpendicular sides equal to $2\,m$ (see figure). Taking the point of intersection of the two mutually perpendicular sides as the origin, find the position vector of centre of mass

Identify the function which represents a periodic motion

A $40\, \mu\,F$ capacitor is connected to a $200\,V$,$50\,Hz$ ac supply. The rms value of the current in the circuit is, nearly :