List of top Questions asked in KCET

A point source of light produces an illumination $I$ at a point. When the distance between them is made four times its original value, the intensity at that point becomes
A dark pattern on a China dish appears brighter than the rest of the dish, when it is strongly heated and taken to a dark room. This is an illustration of
A beam of light is passed through a polaroid and the latter is rotated with the beam of light as axis. The intensity of the emergent light varies between a maximum and minimum. Then the light used is
At $0\, K$ temperature, a $p$ - type semiconductor
Siemens is a unit of
AB is a uniform wire of resistance $2000\,\Omega$ and C is the midpoint of Ag^A voltmeter of resistance $1000\,\Omega$ is connected between A arid B.. Then the reading of the voltmeter, when the p.d. is applied across AB is 150 V, is
Optically active substance among the following is
Water potential in the leaf tissue is positive (+) during
The effective capacitance between the points $A$ and $B$ in the circuit shown in $(\mu F)$ is (capacitance of each capacitor is$(\mu F)$
The focal length of a plano convex lens is equal to its radius of curvature. The value of the refractive index of its material is
The normal magnifying power of a simple microscope is 6. The focal length of the convex lens uses is
Maximum and minimum values of the resultant of two forces acting at a point are $7\, N$ and $3\, N$ respectively. Then smaller force is equal to
Magnetic field due to a long straight conductor of length, carrying current at a point distance from it, is given by
Suppose a tunnel is dug along the diameter of earth. A particle is dropped from a point at a distance $h$ directly above the tunnel. The earth's density is assumed uniform and the friction is neglected, then
A motor
At the mid point along the length of a long solenoid, the magnetic field is equal to x. If the length of the solenoid is doubled and the current is reduced to half, the field at the new mid point will be nearest to
$1000$ drops of water of radius $1\,cm$ each carrying a charge of $10\, esu$ combine to form a single drop. The capacitance of combined drop increases
Two parallel wires carry electric current in same direction. The wires
In India electricity is supplied for domestic use at $220\, V$. It is supplied at $110 \,V$ in USA. If the resistance of a $60 \,W$ bulb for use in India is $R$, the resistance of a $60 \,W$ bulb for use in USA will be
An example of a non ohmic device is
Resistance of an ideal ammeter is
A red flower seen through a green glass looks
Four resistors of $100\,\Omega$ each are connected in the form of a square. Then the effective resistance along the diagonal point is
An electron in motion is associated with
The statement "algebraic sum of currents meeting at a node is zero" is