List of practice Questions

If the pressure potential is +0.16 megapascals (mPa) and the osmotic potential is -0.24 megapascals, then the water potential would be
If the projections of the line segment AB on the yz-plane, zx-plane, xy-plane are $\sqrt{160} , \sqrt{153} , 5 $ respectively then the projection of AB on the z-axis is
If the protential energy of the electron in the hydrogen atom is $\frac {-Ke^2}{r}, $ its kinetic energy is
If the pth, qth and rth terms of an A.P. are in G.P., then the common ratio of the G.P. is
If the position of an electron is known to be within $10^{-12}$ m, then uncertainty in its momentum is
If the power factor changes from $\frac{1}{2}\,to\,\frac{1}{4}$ ,then what is the increase in impedance in A.C. ?
If the pressure in a closed vessel is reduced by drawingbut some gas, the mean free path of the molecules
If the pressure of a gas contained in a closed vessel increases by $x$ % when heated by $1^{\circ}C$, its initial temperature is
If the non-zero numbers $x, y, z$ are in A.P. and $\tan^{-1}x, \tan^{-1}y, \tan^{-1}z$ are also in A.P., then
If the normal to the curve $y^2 = 5x - 1$, at the point (1,- 2) is of the form ax - 5y + b = 0, then a and b are:
If the $p^{th}$, $q^{th}$ and $r^{th}$ terms of a G.P. are again in G.P., then which one of the following is correct?
If the mean of the first n odd natural number be n itself, then n is
If the mean of the squares of first n natural numbers be 11, then n is equal to
If the median and the range of four numbers {x, y, 2x + y, x - y}, where 0 < y < x < 2y, are 10 and 28 respectively, then the mean of the numbers is :
If the mean of numbers $27, 31, 89, 107, 156$ is $82$, then the mean of $130, 126, 68, 50, 1$ is
If the mean of n observations $1^2, 2^2, 3^2....,n^2$ is $\frac{46n}{11}$ , then n is equal to
If the lines $\frac{x+1}{2} = \frac{y-1}{1} = \frac{z+1}{3} $ and $\frac{x+2}{2} = \frac{y-k}{3} =\frac{z}{4} $ are coplanar, then the value of k is :
If the matrix AB = O, then
If the mean deviation about the median of the numbers a, 2a,.......,50a is 50, then | a | equals
If the mean deviation of the numbers 1, 1 + d, 1 + 2d, .... 1 + 100d from their mean is 255, then d is equal to :
If the mean of first n natural numbers is equal to $\frac{n + 7}{3}$, then n is equal to
If the length of three sides of a trapezium other than base are equal to $10 \,cm$, then find the area of trapezium when it is maximum.
If the line $3x - 4y + 5 = 0$ is a tangent to the parabola $y^2 = 4ax,$ then $a$ is equal to
If the line $ax + by + c = 0$ is a tangent to the curve $xy = 4,$ then
If the line joining $(2, 3, -1)$ and $(3, 5, -3)$ is perpendicular to the line joining $(1, 2, 3)$ and $(3, 5, \lambda)$, then $A =$