List of top Physics Questions

The angle for which maximum height and horizontal range are same for a projectile is
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first
A tube of length $L$ is filled completely with an incompressible liquid of mass $M$ and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity $\omega.$ The force exerted by the liquid at the other end is
Which motion does not require force to maintain it?
A ball of mass $m$ elastically collides with a wall with velocity $v$, the $n$ change in its momentum is equal to
An engine pumps up $100\, kg$ of water through a height of $10 \,m$ in $5 \,s$ . Given that, the efficiency of engine is $60\%$ If $ g=10\,ms^{-2}$ the power of this engine is
Two particles of mass $m$ each are tied at the ends of a light string of length $2a$. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance $a$ from the centre $P$ (as shown in the figure). 
Now, the mid-point of the string is pulled vertically upwards with a small but constant force $F$. As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes $2x $ is
A charged particle moves through a magnetic field in a direction perpendicular to it. Then the
Light year is used to measure
"Parsec" is the unit of
Two bodies, $A$ (of mass $1\, kg$) and $B$ (of mass $3 \,kg$) are dropped from heights of $16\, m$ and $25 \,m$, respectively. The ratio of the time taken by them to reach the ground is:-
Two balls are dropped to the ground from different heights. One ball is dropped $ 2\, s $ after the other but they both strike the ground at the same time. If the first ball takes $ 5\, s $ to reach the ground, then the difference in initial heights is $ (g=10m{{s}^{-2}}) $
Total internal reflection takes place
A transistor is operated in common emitter configuration at constant collector voltage $ {{V}_{C}}=1.5\,V $ such that a change in the base current from 100 $ \mu A $ to 150 $ \mu A $ produces a change in the collector current from 5 mA to 10 mA. The current gain ( $ \beta $ ) is
The total energy of an electron in the first excited state of hydrogen is about $- 3.4 \,eV$. Its kinetic energy in this state is
The surface temperature of the Sun which has maximum energy emission at $500 \,nm$ is $6000 \,K$. The temperature of a star which has maximum energy emission at $400\, nm$ will be
The resistance of an ammeter is $ 13 \Omega$ and its scale is graduated for a current upto $100$ amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750$ amperes by this meter. The value of shunt-resistance is
Select the true statement from the following. Nuclear force is
One end of a thermally insulated rod is kept at a temperature $T_1$ and the other at $T_2$. The rod is composed of two sections of lengths $\ell_{1}$ and $\ell_{2}$ and thermal conductivities $k_1$ and $k_2$ respectively. The temperature at the interface of the two sections is
Magnetic field produced due to a current carrying conductor is independent of
In a semiconductor electron concentration is $7 \times 10^{13} \,cm ^{-3}$ and hole concentration is $5 \times 10^{12} \,cm ^{-3}$. Then the semiconductor is
Sound waves cannot travel in vacuum but light can travel in vacuum. Sound waves are longitudinal waves and they cannot be polarised but electromagnetic waves are transverse and they can be polarised.
A boat is rocked by waves of velocity $25 \,m/s$ having crests $100\, m$ apart. They reach the boat once every
A planet having average surface temperature $ T_{0} $ at an average distance $d$ from the sun. Assuming that the planet receives radiant energy from the sun only and it loses radiant energy only from the surface and neglecting all other atmospheric effects we conclude
Two satellites are moving in the same circular orbit around the earth. They must have the same