List of top Questions asked in GUJCET- 2008

Electrical force between two point charges is 200 N. If we increase 10% charge on one of the charges and decrease 10% charge on the other, then electrical force between them for the same distance becomes
There are $ 2.0 \times 10^{24} $ molecular dipoles in a paramagnetic salt. Each has dipole moment $ 1.5 \times 10^{23} Am^2 $. Find maximum (saturation) magnetization in the specimen.
Advantages of optical fibre communications over two wire transmission line or co-axial cable transmission are
If 20 J of work has to be done to move an electric charge of 4 C from a point, where potential is 10 V to another point, where potential is V volt, find the value of V.
The order of a reaction for an esterification process is
How many electrons are present in 3d orbital of tetrahedral $K_2 [NiCl_4]$ complex?
A bar magnet of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is
First order derivation of thermo emf produced in thermo-couple with respect to temperature gives ........
A pure Ge specimen is doped with Al. The number density of acceptor atoms is approximately 10$^{21} m^{-3}$. If density of electron hole pair in an intrinsic semiconductor is approximately 10$^{19} m^{-3}$, the number density of electrons in the specimen is
What is the chemical name of the vitamin $B_{12}$ ?
Which equation is true to calculate the energy of activation, if the rate of reaction is doubled by increasing temperature from $ T_1 \, K \, to \, T_2 $ K?
Oxidation of organic compound $'A'$ with $Na_2Cr_2O_7$ and $H_2SO_4$ gives compound $'B'$, which on reduction with $H_2$ in the presence of Ni catalyst gives ethyl alcohol. Give the name of compound $'A'$.
Two electric bulbs are connected one by one across potential difference V. At that time power consumed in them are $P_1 \, and \, P_2 $ respectively. Now, if potential difference V is applied across series combination of these bulbs, what will be total power consumed ?
The deflection in a moving coil galvanometer falls from 50 divisions to 10 divisions,when a shunt of $ 2? $ is connected with it. The resistance of galvanometer coil is
The internal resistance of a cell of emf 4 V is $ 0.1 \Omega $ It is connected to a resistance of $ 3.9 \Omega $. The voltage across the cell will be
The ratio of cross-sectional areas of two conducting wires made up of same material and having same length is 1 : 2. What will be the ratio of heat produced per second in the wires, when same current is flowing in them?
64 small drops of water having same charge and same radius are combined to form one big drop. The ratio of capacitance of big drop to small drop is
Which of the following element is important to maintain structure of immunoglobulin ?
Which of the following plants develop characters of xerophytes ?
In which layer of the wall of alimentary canal, secretory glands are present ?
Why sometimes, even diploid offspring is produced through Parthenogenesis ?
Which of the following has a role of sertoli cells in spermatogenesis ?
Which of the following takes part in formation of placenta ?
Find out odd one from the following options by considering its role in nitrogen cycle.
Which of the following is correct for lens focussing while seeing distant object ?