List of top Physics Questions asked in AIIMS

A wire of length $L$ is drawn such that its diameter is reduced to half of its original diameter. If the initial resistance of the wire were $10\, \Omega$ , its new resistance would be
Two springs of force constants $k$ and $2k$ are connected to a mass as shown below. The frequency of oscillation of the mass is
An electric dipole placed in a nonuniform electric field experiences
A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
The velocity with which a projectile must be fired so that it escapes earth's gravitation does not depend on
In the following common emitter configuration an $n p n$ transistor with current gain $\beta=100$ is used. The output voltage of the amplificr will be
Bernoulli's equation is a consequence of conservation of
The stars twinkle while the planets do not. The stars are much bigger in size than the planets.
Microwave communication is preferred over optical communication. Microwaves provide large number of channels and bandwidth compared to optical signals.
An astronaut is looking down on earth's surface from a space shuttle at an altitude of $400\, km$. Assuming that the astronaut's pupil diameter is $5 \,mm$ and the wavelength of visible light is $500\, nm$, the astronaut will be able to resolve linear objects of the size about
A neutron makes a head-on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is
A lead shot of $1\, mm$ diameter falls through a long column of glycerine. The variation of its velocity $v$ with distance covered is represented by
A black body, at a temperature of $227^{\circ} C$, radiates heat at a rate of $20 \,cal\, m ^{-2} s ^{-1} .$ When its temperature is raised to $727^{\circ} C$, the heat radiated by it in $cal \,m ^{-2} s ^{-1}$ will be closest to
A double slit experiment is performed with light of wavelength $500\, nm$. A thin film of thickness $2\, \mu m$ and refractive index $1.5$ is introduced in the path of the upper beam. The location of the central maximum will
The motion of planets in the solar system is an example of conservation of
A beam of charged particles is employed in the treatment of cancer. Charged particles on passing through a material medium lose their energy by causing ionization of the atoms along their path.
The difference in the lengths of a mean solar day and a sidereal day is about
The resistivity of a semiconductor increases with temperature. The atoms of a semiconductor vibrate with large amplitude at higher temperatures there by increasing its resistivity.
A rectangular loop carrying a current $i_{1}$, is situated near a long straight wire carrying a steady current $i_{2}$. The wire is parallel to one of the sides of the loop and is in the plane of the loop as shown in the figure. Then the current loop will
In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron density $10^{11}$ per $m ^{3}$ ?
In an ideal parallel $LC$ circuit, the capacitor is charged by connecting it to a $DC$ source which is then disconnected. The current in the circuit
In an experiment to find the focal length of a concave mirror a graph is drawn between the magnitudcs of $u$ and $v$. The graph looks like
What is the path difference for destructive interference?
The Cauchy's dispersion formula is
An electron having charge $e$ and mass $m$ is moving in a uniform electric field $E .$ Its acceleration will be