List of practice Questions

Two capacitors $C_{1}$ and $C_{2}$ in a circuit are joined as shown in figure. The potentials of points A and B are $V_{1}$ and $V_{2}$ respectively. Then the potential of point D will be

Two mercury drops (each of radius r) merge to form a bigger drop. The surface energy of the bigger drop, if T is the surface tension, is

Which of the following is a self adjusting force?

A prism has a refracting angle of 60?? When placed in the position of minimum deviation, it produces a deviation of 30?? The angle of incidence is

The de Broglie wavelength of an electron is $0.4 � 10^{-10}$ m when its kinetic energy is $1.0\, keV$. Its wavelength will be $1.0 \times 10^{-10}\, m$, when its kinetic energy is

When the frequency of the $AC$ voltage applied to a series $LCR$ circuit is gradually increased from a low value, the impedance of the circuit

Identify the correct combination of cropvariety and insect pests.

In dihybrid cross, when F1 plants (RrYy) are self hybridised, the ratio of segregation of yellow and green in F2 is :

Accessory ducts of reproductive system of human female include:

In lac-operon concept of gene expression, allolactose acts as,

A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration

A galvanometer of resistance $50\, O$ is connected to a battery of $3V$ along with a resistance of $2950\, O$ in series shows full-scale deflection of $30$ divisions. The additional series resistance required to reduce the deflection to $20$ divisions is

A basic communication system consists of (i) transmitter (ii) information source (III) user of information (iv) channel (v) receiver

$3ClO^{-}(aq) -> ClO^- + 2Cl^-$ is an example of

Pick out the correct statement with respect to $[Mn(CN)_6]^{3-}$ :

If $\left( \frac{1 + i}{1 - i} \right)^m =1$, then the least positive integral value of $m$ is

Equation of line passing through the point $(1,2)$ and perpendicular to the line $y = 3x -1$ is

If $|x -1| \leq 1$, then

So far 1.5 million species are identified, in which the number of fungi species identified is more than the combined total of:

Restriction endonucleases are isolated from some bacteria. Their role in bacteria is:

Which of the following vector-borne diseases caused by Aedes mosquitoes ?

The hormones involved in maintaining calcium balance in the human body are:

For real $x$, the greatest value of $\frac{x^{2}+2x+4}{2x^{2}+4x+9}$ is

Which of the following plants produce zygomorphic flowers?

The secondary wall material Suberin is deposited on the walls of