List of top Physics Questions

In forced oscillation of a particle the amplitude is maximum for a frequency $\omega_1$ of the force, while the energy is maximum for a frequency $\omega_2$ of the force, then
One-fourth length of a spring of force constant $k$ is cut away. The force constant of the remaining spring will be
What are the units of K=$\frac{1}{4\pi\,\in_0}$
The separation between the two charges $ +q $ and $ -q $ becomes double. The value of force will be:
When a glass rod is rubbed with silk, the amount of positive charge acquired by glass rod in magnitude is:
A charged oil drop is suspended in a uniform field of $3 ? 10^4 \,V/m$ so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge $= 9.9 ? 10^{-15}\, kg$ and $g = 10\, m/s^2$)
Consider the charge configuration and a spherical Gaussian surface as shown in the figure. When calculating the flux of the electric field over the spherical surface, the electric field will be due to.
The electric field due to a uniformly charged sphere of radius $R$ as a function of the distance from its centre is represented graphically by
If a square coil is making an angle $ 60^{\circ }$ with electric field $E $ according to figure the electric flux passing through the square coil is (the side of square is $4\, cm$):
In the basic $CsCL$ crystal structure, $Cs^+$ and $Cl^-$ ions are arranged in a bcc configuration as shown in the figure. The net electrostatic force exerted by the eight $Cs^{+}$ ions on the $Cl^-$ ions is
An electric dipole has the magnitude of its charge as $q$ and its dipole moment is $p$. It is placed in a uniform electric field $E$. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively
A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one second. If the speed of sound in air is $340 \,ms ^{-1}$, the distance between the cliffs is ..........
Six charges, three positive and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at O is double the electric field when only one positive charge of same magnitude is placed at R Which of the following arrangements of charge is possible for, P, Q, R, S, T and U respectively ?
A parallel plate capacitor having a plate separation on $2\, mm$ is charged by connecting it to a $300\, V$ supply. The energy density is:
Intensity of an electric field $E$ due to a dipole, depends on distance $r$ as:
A $40\, \mu F$ capacitor in a defibrillator is charged to $3000 \,V$. The energy stored in the capacitor is sent through the patient during a pulse of duration $2\, ms$. The power delivered to the patient is
Equipotential surfaces associated with an electric field which is increasing in magnitude along the $x-$ direction are
A charged particle $q$ is shot towards another charged particle $Q$ which is fixed, with a speed v it approaches $Q$ upto a closest distance $r$ and then returns. If $q$ were given a speed $2v$, the closest distances of approach would be
A diamagnetic substance is placed in a magnetic field of a bar magnet. Then it is
The true geographic north direction is found by using a compass needle. The magnetic meridian of the earth is along the axis of rotation of the earth.
For an isotropic medium $B,\, \mu,\, H$ and $M$ are related as (where $B,\, \mu_{0},\, H$ and $M$ have their usual meaning in the context of magnetic material :
Curie-Weiss law is obeyed by iron at a temperature ...........
A stone tied to one end of spring $80\,cm$ long is whirled in a horizontal circle with a constant speed. If stone makes $25 $ revolutions in $14 \sec$, the magnitude of acceleration of stone is :
A motorcycle is going on an over bridge of radius $R$. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on it
A bullet of mass $0.01$ kg is fired from a rifle of mass $10$ kg with a speed of $200$ m/sec. The recoil speed of the rifle is