List of top Physics Questions asked in KCET

A thin plano-convex lens acts like a concave mirror of focal length $0.2\, m$ when silvered from its plane surface. The refractive index of the material of the lens is $1.5.$ The radius of curvature of the convex surface of the lens will be ............
An unknown resistance $R_{1}$ is connected in series with a resistance of $10 \Omega .$ This combination is connected to one gap of a metre bridge while a resistance $R_{2}$ is connected in the other gap. The balance point is at $50\, cm$. Now, when the $10 \Omega$ resistance is removed the balance point shifts to $40 cm$. The value of $R_{1}$ is (in ohm)
A spherical drop of capacitance $1 \mu \,F$ is broken into eight drops of equal radius. Then, the capacitance of each small drop is ........
Three long straight wires $A, B$ and $C$ are carrying currents as shown in figure. Then the resultant force on $B$ is directed .............
Two equal forces ($P$ each) act at a point inclined to each other at an angle of $120^\circ$. The magnitude of their resultant is _____
SI unit of permittivity is ...........
An uncharged sphere of metal is placed inside a charged parallel plate capacitor. The lines of force will look like .........
Motor cells are found in______
H - polaroid is prepared by _____
A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film. When the portion $A$ is punctured with a pin, the thread ..........
The loudness and pitch of a sound note depends on .........
A beam of light of wavelength $600\, nm$ from a distant source falls on a single slit $1\, mm$ wide and the resulting diffraction pattern is observed on a screen $2\, m$ away. The distance between the first dark fringes on either side of the central bright fringe is
The refractive index of a particular material is $1.67$ for blue light, $1.65$ for yellow light and $1.63$ for red light. The dispersive power of the material is .........
A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one second. If the speed of sound in air is $340 \,ms ^{-1}$, the distance between the cliffs is ..........
Curie-Weiss law is obeyed by iron at a temperature ...........
When light is incident on a diffraction grating the zero order principal maximum will be _____
Rainbow is formed due to.............
When a body is earth connected, electrons from the earth flow into the body. This means the body is .............
The emitter-base junction of a transistor is ............. biased while the collector-base junction is ............. biased.
13 resistors each of resistance $R\,\Omega$ are connected in the circuit as shown in figure. The effective resistance between A and B is
As a result of interference of two coherent sources of light, energy is
When 100 V d.c. is applied across a coil, a current of 1 A flows through it. When 100 V a.c. of 50 Hz is applied to the same coil only 0.5 A flows. The inductance of the coil is
A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is
If both the mass and radius of the earth decrease by $1%$. then
Weight of a body of mass m decreases by $1%$ when it is raised to height $h$ above the earth's surface. If the body is taken to a depth $h$ in a mine, change in its weight is