List of top Physics Questions asked in AIIMS

The curve drawn between velocity and frequency of photon in vacuum will be a

A monkey of mass $m$ kg slides down a light rope attached to a fixed spring balance, with an acceleration $a$. The reading of the balance is $w kg [g=$ acceleration due to gravity $]$

Seven resistances are connected as shown in the given figure. The equivalent resistance between $A$ and $B$ is

A bar of magnetic substance is placed in a magnetic field with its length making an angle of $30^{\circ}$ with the direction of the magnetic field. How will the bar behave?

Let $K_{1}$ be the maximum kinetic energy of photoelectrons emitted by light of wavelength $\lambda_{1}$ and $K_{2}$ corresponding to wavelength $\lambda_{2}$. If $\lambda_{1}=2 \lambda_{2}$, then

Starting with a sample of pure ${ }^{66} Cu , 7 / 8$ of it decays into $Zn$ in $15 \,min$. The corresponding half-life is

The equivalent resistance between the points $X$ and $Y$ in the following circuit diagram will be

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A): A bird perches on a high power line and nothing happens to the bird.
Reason (R): The level of bird is very high from the ground.
In the light of the above statements, choose the correct answer from the options given below

In an SHM, kinetic and potential energies become equal when the displacement is 1/$\sqrt{2}$ times the amplitude. In SHM, kinetic energy is zero when potential energy is maximum.

A charge $q$ is uniformly distributed on a ring of radius $r$. A sphere of an equal radius is constructed with its centre lying on the periphery of the ring. The flux of electric field through the surface of the sphere will be

Electric field at the centre of a uniformly charged semicircle of radius a is

Two closed organ pipes of length $100 \,cm$ and $101\, cm$ produces $16$ beats in $20\, sec .$ When each pipe is sounded in its fundamental mode calculate the velocity of sound.

The velocity of electromagnetic radiation in a medium of permittivity ? and permeability � is given by

The forbidden gap in the energy bands of silicon is

When white light passes through a prism, the deviation is maximum for

Two heater wires, made of the same material and having the same length and the same radius, are first connected in series and then in parallel to a constant potential difference. If the rates of heat produced in the two cases are $H_s$ and $H_p$ respectively, then $H_s /H_p$ will be

Three point charges $+q,-2 q$ and $+q$ are placed at points $(x=0, y=a, z=0),(x=0, y=0, z=0)$ and $(x=a, y=0, z=0)$, respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

The magnifying power of a compound microscope increase with

When the velocity of projection of a body is made $n$ times, its time of flight becomes $n$ times. Range of projectile does not depend on the initial velocity of a body.

The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area. The magnetic field inside the solenoid is uniform.

The colour of the green flower seen through red glass appears to be dark. Red glass transmits only red light.

: The alternating current lags behind the e.m.f. by a phase angle of $\pi / 2$, when AC flows through an inductor. : The inductive reactance increases as the frequency of $A C$ source decreases.

An electric motor will have maximum efficiency when back emf becomes equal to half of applied emf. Efficiency of electric motor depends only on magnitude of back emf.

An object $5\, cm$ tall is placed $1\, m$ from a concave spherical mirror which has a radius of curvature of $20 \,cm$. The size of the image is

A particle of mass $m$ moves with constant speed along a circular path of radius $r$ under the action of force $F .$ Its speed is