List of top Questions asked in JEE Main, KCET

Two wires of same dimensions but resistivities $\rho_1$ and $\rho_2$ are connected in series. The equivalent resistivity of the combination is
A charge $q$ is placed at the centre of line joining two equal point charges each equal to $+Q$. The system of $3$ charges will be in equilibrium if $q$ is equal to
In the circuit shown, the effective capacitance between A and B is
Three vectors satisfy the relation $\overrightarrow{A}.\overrightarrow{B}=0$ and $\overrightarrow{A}.\overrightarrow{C}=0$ then $\overrightarrow{A}$ is parallel to
The time taken by AC of 50 Hz in reacting from zero to the maximum value is
The aperture of objective lens of a telescope is made large so as to
Hesss law states that
Yellow light is used in single slit diffraction experiment with slit width 0.6 mm. If yellow light is replaced by X-ray then the pattern reveals
The phenomenon of rotation of plane polarised light is called
For a given velocity, a projectile has same range $R$ for two angles of projections. If $t_1$ and $t_2$ are the time of flight in the 2 cases then
A sample of ideal monoatomic gas is taken around the cycle ABC A as shown in figure. The work done during cycle is
A lamp hanging 4 m above the table is lowered by 1 m. The illumination on the table
To send 10% of main current through a moving coil galvanometer of resistance $99\,\Omega$ the shunt required is
In Young's double slit experiment, the central bright fringe can be identified
Which of the following is not a proposition.
A and B are two conductors carrying a current I in the same direction, $x$ and $y$ are two electron beams moving in the same direction.
A superconductor exhibits perfect
A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are
The SI unit of radioactivity is
In nuclear fission the percentage of mass converted into energy is about
Imino acid among these compounds is
An object is placed 12 cm to the left of a converging lens of focal length 8 cm. Another converging lens of 6 cm focal length is placed at a distance of 30 cm to the right of the first lens. The second lens will produce
Organic acid without a carboxylic acid group is
A Carnot's engine is made to work between $200^\circ \,C$ and $0^\circ \,C$ first and then between $0^\circ \,C$ and $-200^\circ \,C$. The ratio of efficiencies of the engine is the two cases is
A ray of light travels from an optically denser to a rarer medium. The critical angle for the two media is C. The maximum possible deviation of the ray will be