List of top Physics Questions asked in AIIMS

Reciprocal of impedance is
In Young's double slit experiment, the two slits act as coherent sources of equal amplitude a and of wavelength $\lambda$. In another experiment with the same set up, the two slits are sources of equal amplitude a and wavelength $\lambda$, but are incoherent. The ratio of intensities of light at the mid point of the screen in the first case to that in the second case is
Transformers are used only in alternating current source not in direct current. Only a.c. can be stepped up or down by means of transformers.
The dimensional formula for product of resistance and conductance is same as for dielectric constant. Both have dimensions of time constant.
Impulsive force is large and acts for a short time. Finite change in momentum should be produced by the force.
A total reflecting prism is used to erect the inverted image without deviation. Rays of light incident parallel to base of prism emerge out as parallel rays.
A proton and an alpha particle having the same kinetic energy are moving in circular paths in a uniform magnetic field. The radii of their circular pahts will be equal. Any two charged particles having equal kinetic energies and entering a region of uniform magnetic field $\vec{ B }$ in a direction perpendicular to $\vec{ B }$, will describe circular trajectories of equal radii.
A charge, whether stationary or in motion produces a magnetic field around it. Moving charges produce only electric field in the surrounding space.
A wire of length $l$ and mass m is bent in the form of a semicircle. The gravitational field intensity at the centre of semicircle is
A short linear object, of length $l$, lies along the axis of a concave mirror, of focal length $f$, at a distance $d$ from the pole of the mirror. The size of the image is then (nearly)
A convex lens of refractive index $\frac{3}{2}$ has a power of $2.5\, D$ in air. If it is placed in a liquid of refractive index $2$, then the new power of the lens is
An alternating current $i$ in an inductance coil varies with time according to the graph given below. Which one of the following graphs gives the variation of voltage with time?
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
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