List of top Physics Questions

The unit of physical quantity obtained integral of electric field is
Charge $q_2$ of mass m revolves around a stationary charge $q_1$ in a circular orbit of radius r. The orbital periodic time of $ q_2 $ would be
There exists an electric field of 1 N/C along $Y$ direction. The flux passing through the square of 1 m placed in $XY$ plane inside the electric field is
A spherical conducting shell of inner radius $r_{1}$ and outer radius $r_{2}$ has a charge $Q$. A charge $-q$ is placed at the centre of the shell. The surface charge density on the inner and outer surfaces of the shell will be
Among the following, the correct graphical representation of electric intensity as a function of distance from the centre of a uniformly charged conducting sphere is shown in
An electron c penetrates through a thin plate A and enters the electric field region between parallel plates A and B. It gets slowed down Three other particles-proton (p), alpha particles $(\alpha)$ and beta particles $(\beta^-)$ - similarly penetrate through either plate A or plate B as shown. The correct statement as regards the speed of the particles is
Gauss's law can't be used to calculate electric field near an electric dipole. Electric dipole don't have symmetrical charge distribution.
The total electric flux emanating from a closed surface enclosing an $\alpha$-particle (e = electronic charge) is
A small drop of mercury is spherical but bigger drops are oval in shape. surface tension of liquid decreases with increase in temperature.
The unit of surface tension is
In the given network, the value of $C$, so that an equivalent capacitance between $A$ and $B$ is $3\mu F$, is
Charges $5 \mu C$ and $10 \mu C$ are placed 1 m apart. Work done to bring these charges at a distance 0.5 m from each other is $(k = 9\times 10^9 SI)$
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface becomes 80 V. The potential at the centre of the sphere is
A $600 \,pF$ capacitor is charged by $200 \,V$ supply. It is then disconnected from the supply and is connected to another $300 \,pF$ capacitor. The electrostatic energy lost in the process is
How many $ 1\,\mu F $ capacitors must be connected in parallel to store a charge of $1\, C$ with a potential of $110\, V$ across the capacitors?
Which one of the following is not made of soft iron?
A bar magnet of magnetic moment $10^{4}\, J / T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4 \times 10^{-5}\, T$ to a direction of $60^{\circ}$ from the field will be
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance. The magnetic forces between two poles do not follow inverse square law of distance.
Which of the following substances magnetic susceptibility $\chi_{m}$ is negative?
A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is $v$, the total area around the fountain that gets wet is
A particle of mass $m$ is projected with a velocity $\upsilon$ making an angle of 30$^{\circ}$ with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height $h$ is :
A ball rolls of the top of a stair way with a horizontal velocity $ u\,m{{s}^{-1}}. $ If the steps are $ h $ metre high and b metre wide, the ball will hit the edge of the nth step, where $ n $ is
The equation of projectile is $y = ax - bx^2$ where $a$ and $b$ are the constants. Its horizontal range is
Mark the correct option. If a ball is projected with velocity $ {{v}_{o}} $ at an angle of elevation 30?, then
The height $y$ and the distance $x$ along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by $y\, = \,(8t - 5t^2 )$ metre and $x = 6t$ metre, where $t$ is in second. The velocity of projection is