List of practice Questions

There are three coplanar parallel lines. If any $P$ points are taken on each of the lines, the maximum number of triangles with vertices at these points, is

There are two holes one each along the opposite sides of a wide rectangular tank. The cross section of each hole is $0.01\,m^2$ and the vertical .distance between the holes is one meter. The tank is filled with water. The net force on the tank in New ton when water flows out of the holes is : (Density of water $1000kg/m^3)$

There are two rows of inner transition elements in the periodic table each containing $14$ elements. The reason for this may be

There are four forces acting at a point $P$ produced by strings as shown in figure, which is at rest. The forces $F_{1}$ and $F_{2}$ are

There are N coplanar vectors each of magnitude V. Each vector is inclined to the preceding vector at angle $\frac{2 \pi}{N} .$ What is the magnitude of their resultant?

There are certain material developed in laboratories which have a negative refractive index. A ray incident from air (medium $1$) into such a medium (medium $2$) shall follow a path given by

There are $15$ points in a plane, no three of which are in a straight line, except $6$, all of which are in a st. line. The number of st. lines which can be drawn by joining them is

There are $2$ bodies of masses $100\, kg$ and $1000\,kg$ separated by a distance $1\,m$. At what distance from smaller body, the intensity of gravitational field will be zero

There are $25$ points in a plane, of which $10$ are on the same line. Of the rest, no three are collinear and no two are collinear with any one of the first ten points. The number of different straight lines that can be formed by joining these points is

The working principle in atom bomb is

The zone at the edge of a lake or ocean which is alternately exposed to air and immersed in water is called.

There are $10$ points in a plane of which $4$ are collinear. The number of quadrilaterals that can be formed is

There are 10 true-false questions in a examination. Then these questions can be answered in:

The wonder drug, penicillin is extracted from which of the following species of Penicillium?

The word physics itself is due to Greek word

The work done by a body against friction always results in

The work done in adiabatic process is given by Here, symbols have their usual meaning

The weight of the body is maximum in

The weighted mean of first n natural numbers, whose weights are proportional to the corresponding numbers, is

The wheels are made circular because

The width of the forbidden band is small in the case of

The waves used by artificial satellites for communication is

The weakest interparticle forces are present in

The wavelength of sodium light in glass if it is 589.3 nm in air is (The refractive index of glass is 1.5).

The wavelength of X-rays which gives a diffraction angle, 2 $\theta$, equal to $16.80^{\circ}$ for a first order diffraction for a crystal with interplanar distance 0.200 nm, is (given sin $8.4^{\circ}$ and 0.146)