List of practice Questions

Two identical particles each of mass 'm' start moving towards each other from rest from infinite separation under gravitational attraction. Their relative velocity of approach at separation 'r' is

A binary solution of ethanol and n-heptane is an example of

If $\sec \, \theta - \tan \, \theta = \frac{1}{2}, $ then $\theta$ lies in

The study of photoelectric effect is useful in understanding:

Corner points of the feasible region for an LPP are (0, 2) (3, 0) (6, 0), (6, 8) and (0, 5). Let F = 4x + 6y be the objective function. The minimum value of F occurs at

If one can induce parthenocarpy through the application of growth substances which fruits would you select to induce parthenocarpy and why?

A compound is formed by substitution of two chlorine for two hydrogens in propane. The number of possible isomeric compounds is 

If nt number of radioatoms are present at time t, the following expression will be a constant : 

The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency v of the incident radiation is doubled. The work function of this metal is

Consider a cylindrical conductor of Length L and area of cross section A. The specific conductivity varies as $\sigma (x) = \sigma_0 \frac{L}{\sqrt{x}}$ where x is the distance along the axis of the cylinder from one of its ends. The resistance of the system along the cylindrical axis is

See the figure and find the ratio of
(a) Number of triangles to the number of circles inside the rectangle.
(b) Number of squares to all the figures inside the rectangle.
(c) Number of circles to all the figures inside the rectangle.

As a result of change in the magnetic flux linked to the closed loop shown in the figure, an emf V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is:
 

Conjugate acid of $SO_4^{2-}$ is

List various types of isomerism possible for coordination compounds, giving an example of each

Sweety runs around a square park of side 75 m. Bulbul runs around a rectangular park with length 60 m and breadth 45 m. Who covers less distance?

The probability that a non-leap year will have only 52 Fridays is

The domain of $\cos^{-1} \sqrt{2x}$ is

Five square flower beds each of sides 1 m are dug on a piece of land 5 m long and 4 m wide. What is the area of the remaining part of the land?

Which of the following relation is NOT a function

In a stationary wave along a string the strain is

If Meena gives an interest of Rs 45 for one year at 9% rate p.a.. What is the sum she has borrowed?

Out of dia, para and ferromagnetism, the universal property of all substances is