List of top Questions asked in KCET

Bright colours exhibited by spider's web, exposed to sun light are due to
In an ideal transformer, the voltage and the current in the primary are 200 V, 2A and that in the secondary are 2000 V, I A. The value of I is (A)
Light of certain wavelength and intensity ejects photoelectrons from a metal plate. Then this beam is replaced by another beam of smaller wavelength and smaller intensity. As a result
A galvanometer has a resistance G and a current flowing in it produces full scale deflection. \(S_1\) is the value of the shunt, which converts it into an ammeter of range \(0-I\) and \(S_2\) is the value of the shunt for the range \(0-2I\). The ratio is
$P, Q$ and $R$ are three coplanar forces acting at a point and are in equilibium. Given $P=1.9318\, kg\, wt$ $\left[\sin \theta_{1}=0.9659\right]$, the value of $R$ (in $kg$ wt) is
Choke used to limit high frequency A.C. has
One mole of an ideal gas undergoes a cyclic change ABCD. From the given diagram calculate the net work done in the process. (1 atm = $10^6\,dyne\,cm^{-2}$) is
Kirchhoff's voltage law is based on the law of conservation of
Velocity of light, according to this theory, is greater in a denser medium than in a rarer medium
A mirror produces a magnified erect image of an object. The nature of the mirror is
Time of exposure for a photographic print is 10 s, when a lamp of 50 cd is placed at 1 m from it. Then another lamp of luminous intensity I is used, and is kept at 2 m from it. If the time of exposure now is 20 sec, the value of I is (cd)
Numerical aperture of an oil immersion objective using oil of R.I. 1.5 is 0.75. Then, its numerical aperture, when kept in air is
The number of degrees of freedom for each atom of a monatomic gas is
The magnifying power of a simple microscope M is given by
A stone of mass 1 kg tied to the end of a string of length 1 m, is whirled in a horizontal circle, with a uniform angular velocity 2 radian/sec. The tension of the string is (N)
A light body A and a heavy body B have equal linear momentum. Then the K.E. of the body A
In R.H. Whittaker's five-kingdom classification, Protista comprises
An electric bulb marked $40\, W$ and $200\, V$, is used in a circuit of supply voltage $100\, V$. Now its power is
A basic lining is given to a furnace by using
Colour of light having maximum speed in air is
Two resistances $R_1$ and $R_2$ have effective resistance $R_s$ when connected in series and $R_p$, when connected in parallel. If $R_s R_p=16$ and $R_1/R_2=4$, calculate the values of $R_1$and $R_2$ (in units of resistance).
The process of zone refining is used in purification of
Ebonite is
Which of the following is an unsaturated acid ?
Calculate the current I in the circuit shown