List of practice Questions

In the circuit shown in the figure, the input voltage $V_i$ is $20 \, V , V_{BE} = 0 $ and $V_{CE} = 0$ .The values of $I_B , I_C$ and $\beta$ are given by

In a $p-n$ junction diode, change in temperature due to heating

Histamine is secreted by

Two planets A and B have the same average density. Their radii $R_A$ and $R_B$ are such that $R_A : R_B = 3 : 1$. If $g_A $ and $g_B$ are the acceleration due to gravity at the surfaces of the planets, the $g_A : g_{B}$ equals

During the fusion of organic compound with sodium metal, nitrogen present in the organic compound is converted into

A boy stands on a weighing machine inside a lift. When the lift is going down with acceleration $g/4$, the machine shows a reading $30 \,kgf$. When the lift goes upwards with acceleration $g/4$, the reading would be

A body starts from rest and travels a distance S with uniform acceleration, then moves uniformly a distance 2S and finally comes to rest after moving further 5S under uniform retardation. The ratio of the average velocity to maximum velocity is

The Young's modulus of a rope of $ 10\,m$ length and having diameter of $2\,cm$ is $ 200\times 10^{11}\,dyne/cm^{2}$ . If the elongation produced in the rope is $ 1\,cm, $ the force applied on the rope is

A body of mass $m_{1}$ collides elastically with another body of mass $m_{2}$ at rest. If the velocity of $m_{1}$ after collision becomes $ 2/3 $ times its initial velocity, the ratio of their masses, is

For a projectile the time of flight of a body becomes n times the original value if its speed is made n times. This is due to the range of the projectile which becomes n times.

Which of the following belongs to Class Osteichthyes?

The final product of the given reaction is

Which of the following order is correct?

In which of the following elements number of d-electrons is zero in 6d-orbital?

Which of the following contains atleast one lone pair in all of its halides?

Which of the following exhibits minimum number of oxidation states?

Major product of the given reaction is

Which of the following has lowest wavelength -

Which of the following is not an example of addition polymer

Which one is Total Stem Parasite?

Which one of the following has the largest population in a Food Chain?

Which reagent is capable of giving test both of Aldehyde and ketones

Which of the following animal groups belong to same class ?

Which among the following compounds will have meso form

Unit of Coefficient of thermal conductivity in MKS is