List of top Physics Questions asked in COMEDK UGET

Two identical rods of length L, mass M are riveted at right angles at their mid points Moment of inertia of the system about the perpendicular axis passing through the centre is

Ratio of maximum to minimum intensities is

Two charges $4q$ and $q$ are placed $3x$ apart in air $A$ charge $Q$ is placed at a point on the line joining so that the systein of these charges remains in equilibrium. Then, the distance of $Q$ from $4q$ and the value of $Q$ are

An unpolarized light is incident on a system of two crossed polaroids $A$ and $B$. Now the second polaroid $B$ is rotated by, $30^{\circ} $ towards $A$. Percentage of light transmitted through the system is

A uniform wire of resistance $R$, of the radius $r$ is uniformly drawn until its radius is reduced to $r/ n$, Its new resistance is

Among the following, the correct graphical representation of electric intensity as a function of distance from the centre of a uniformly charged conducting sphere is shown in

An electron c penetrates through a thin plate A and enters the electric field region between parallel plates A and B. It gets slowed down Three other particles-proton (p), alpha particles $(\alpha)$ and beta particles $(\beta^-)$ - similarly penetrate through either plate A or plate B as shown. The correct statement as regards the speed of the particles is

A single slit diffraction pattern is obtained on a screen using 600 nm light when the width of the central (principal) maximum is 0.30 mm. The width of the slit is reduced by 50%. and then illuminated by 450 nm light. Width, in mm, of the central maximum in the second case is;

Which of the following effects could not be observed for sound waves in air ?

A bi-metallic slab is made (refer figure) by fusing two material. The components have same thickness and lengths, but are of thermal conductivities $K_1$ and $K_2$. If the heat were to conduct across the faces $(T_1 > T_2)$, then effective thermal conductivity of the composite slab is

A prism with a refracting angle $30^{\circ}$, made of material of refractive index 1.732, has one of its faces silvered. A ray of light incident at a certain angle on the other face retraces the path after getting reflected at the silvered face. The angle of incidence is

A body of mass 3 kg at rest is acted on by a force and the body moves through a distance 20 m in 5 s. Force on the body is

A gas is considered ideal at

Raindrops falling down attain limited value of velocity because of

A voltmeter can read up to $V$ volt. When the series resistance used in the voltmeter is doubled, range of voltmeter is

Charges $4Q$ and $Q$ are kept separated by a certain distance and are placed at $A$ and $B$, respectively. Electric intensity at $B $ is $E$. Electric intensity at $A$ is

Abody of mass m is raised through a distance equal to the radius of the earth, (R), from the earth surface. Increase in potential energy is

A wire of resistance $9 \Omega$ is uniformly stretched such that.its radius becomes $1/3$ of the original radius. Ratio of the new to old resistance is

Light rays from a luminous (bright point) object in a denser medium of refractive index n at a depth h, outline a circle of radius equal to the depth, at the interface. The refractive index of denser medium is