List of top Physics Questions asked in JEE Advanced

Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to $ R^{-5/2} $ , then

For an ideal gas

An astronomical telescope has an angular magnification of magnitude 5 for far objects. The separation between the objective and the eyepiece is 36 cm and the final image is formed at infinity. The focal length $f_o$ of the objective and the focal length $f_e$ of the eyepiece are

Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii $R_1$ and $R_2$ respectively. The ratio of the mass of X to that of Y is

Two bodies M and N of equal masses are suspended from two separate massless springs of spring constants kx and k2 respectively. If the two bodies oscillate vertically such that their maximum velocities are equal, the ratio of the one amplitude of vibration of M to that of N is

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is

The impurity atoms with which pure silicon should be doped to make a p-type semiconductor are those of

If one mole of a monoatomic gas ($\gamma$ = 5/ 3) is mixed with one mole of a diatomic gas ($\gamma$ = 7 / 5), the value of $\gamma$ for the mixture is

A cylinder of radius R made of a material of thermal conductivity $K_1$, is surrounded by a cylindrical shell of inner radius R and outer radius 2R made of a material of thermal conductivity K$_2$. The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

A satellite $S$ is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then,

A particle executes simple harmonic motion with a frequency f. The frequency with which its kinetic energy oscillates is

During a negative beta decay

A tube closed at one end containing air produces fundamental note of frequency $512\, Hz$. If the tube is open at both the ends, the fundamental frequency will be

A reference frame attached to the earth

Two thin long parallel wires separated by a distance b are carrying a current i ampere each. The magnitude of the force per unit length exerted by one wire on the other is

A simple pendulum of length L and mass (bob) M is oscillating in a plane about a vertical line between angular limits- $\phi$ and $+\phi$ For an angular displacement $\theta(| \theta |< \phi)$, the tension in the string and the velocity of the bob are T and v respectively. The following relations hold good under the above conditions

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E and B represent the electric and magnetic fields respectively. Then, this region of space may have

The X-ray beam coming from an X-ray tube will be

70 cal of heat are required to raise the temperature of2 moles of an ideal diatomic gas at constant pressure from 30$^{\circ}$C to 35$^{\circ}$C. The amount of heat required (in calorie) to raise the temperature of the same gas through the same range (30$^{\circ}$C to 35$^{\circ}$C) at constant volume is

A uniform chain of length $L$ and mass $M$ is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If $g$ is acceleration due to gravity, work required to pull the hanging part on to the table is

A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If steady current I is established in the wire as shown in the figure, the loop will

White light is used to illuminate the two slits in a Young's double slit experiment. The separation between the slits is b and the screen is at a distance d (>> b) from the slits. At a point on the screen directly in front of one of the slits, certain wavelengths are missing. Some of these missing wavelengths are

$L, C$ and $R$ represent the physical quantities inductance, capacitance and resistance respectively. The combinations which have the dimensions of frequency are

A box is moved along a straight line by a machine delivering constant power. The distance moved by the body in time $t$ is proportional to

A ray of light from a denser medium strikes a rarer medium at an angle of incidence i (see figure). The reflected and refracted rays make an angle of $90^\circ$ with each other. The angles of reflection and refraction are r and r'. The critical angle is