List of top Physics Questions

A solid cylinder and a hollow cylinder, both of the same mass and same external diameter are released from the same height at the same time on an inclined plane. Both roll down without slipping. Which one will reach the bottom first?

A gramophone record is revolving with an angular velocity $\omega$. A coin is placed at a distance $r$ from the centre of the record. The static coefficient of friction is $\mu$. The coin will revolve with the record if

The set which represents the isotope, isobar and isotone respectively is

The ratios of the distance traversed, in successive intervals of time by a body, falling from rest, are

The temperature of a gas contained in a closed vessel of constant volume increases by $1^\circ$C when the pressure of the gas is increased by $1\%$. The initial temperature of the gas is ..........

Two smalI spheres of masses $M_1 $ and $M_2$ are suspended by weightless insulating threads of lengths $ L_1$ and $ L_2$. The spheres carry charges $Q_1$ and $Q_2$ respectively. The spheres are suspended such that they are in level with one another and the threads are inclined to the vertical at angles of $\theta_1 $ and $\theta_2$ as shown. Which one of the following conditions is essential, if $\theta_1 = \theta_2$ ?

There is a uniform electric field of intensity $E$ which is as shown. How many labelled points have the same electric potential as the fully shaded point?

For measurement of potential difference, potentiometer is preferred in comparison to voltmeter because

In a parallel plate capacitor, the capacity increases if

The equation of a simple harmonic progressive wave is given by $ y = A \,sin \,(100\, \pi t - 3x) $ . Find the distance between $ 2 $ particles having a phase difference of $ \frac{\pi}{3} $ .

Which of the following relation is true?

The binding energy per nucleon, for nuclei with atomic mass number $A > 100$ decreases with $A$. The nuclear forces are weak for heavier nuclei.

With an increase in temperature, surface tension of liquid (except molten copper and cadmium)

The increase in pressure required to decrease the $ 200 \,L $ volume of a liquid by $ 0.008\% $ in $ kPa $ is (Bulk modulus of the liquid $ = 2100 \,MPa $ is)

For an opaque body coefficient of transmission is

A transformer cannot work on $DC$ supply. $DC$ changes neither in magnitude nor in direction.

Half-life of a radioactive substance is $20$ minute. The time between $20\%$ and $80\%$ decay will be :

The decimal equivalent of the binary number $(11010.101)_2$ is

Two solid spheres of same metal but of mass $M$ and $8\,M$ fall simultaneously on a viscous liquid and their terminal velocities are $v$ and $nv$, then value of $n$ is

A ball is projected horizontally with a velocity of $5 \,m/s$ from the top of a building $19.6\, m$ high. How long will the ball take of hit the ground ?

In Young�s double slit experiment, the fringe width is $\beta$. If the entire arrangement is placed in a liquid of refractive index $n$, the fringe width becomes :

The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is

Radius of gyration of disc of mass 50 g and radius 2.5 cm about an axis passing through its center of gravity and perpendicular to the plane is

If $ 10^{10} $ electrons are acquired by a body every second, the time required for the body to get a total charge of $1 \,C$ will be

A circuit contains a capacitor and inductance each with negligible resistance. The capacitor is initially charged and the charging battery is disconnected. At subsequent time, the charge on the capacitor will