List of practice Questions

What is the electric flux linked with closed surface ?

When a body is charged by induction, then the body

When a person combs his hair, static electricity is sometimes generated by what process?

Which of the following statements about dipole moment is not true?

Which of the following is best insulator ?

The roots $\alpha$ and $\beta$ of the quadratic equation $px^2 + qx + r = 0$ are real and opposite signs. The roots of $\alpha(x - \beta^2)+ \beta (x - \alpha)^2 = 0$ are

The roots of the equation $(3 -x)^4 + (2-x)^4$ = $(5 - 2x)^4$ are

The equations $x^2 - ax + b = 0$ and $x^2 + bx - a = 0$ have a common root, then

Let $f(x)=[x^3-3],[x]=$ G.I.F. Then the no. of points in the interval (1,2) where function is discontinuous is

The domain and range of the function $f=\left\{\left(\frac{1}{1-x^{2}}\right) : x \in R, x \ne \pm 1\right\}$ are respectively

The domain of $f\left(x\right) = \frac{1}{\sqrt{2x -1}} - \sqrt{1-x^{2}} $ is :

The domain of $f(x) = \sin^{-1} \left( \frac{2x -3}{5} \right)$

The domain of $f(x) = \frac{|x|}{x}$ is

The domain of the function $f\left(x\right)=\frac{1+2\left(x+4\right)^{-0.5}}{2-\left(x+4\right)^{0.5}}+5\left(x+4\right)^{0.5}$ is

The domain of the function $f \left(x\right)=\frac{1}{\sqrt{\left\{sin\,x\right\}+\left\{sin\left(\pi+x\right)\right\}}}$ where $\{\cdot \}$ denotes fractional part, is

The domain of the function $f(x) = {^{24- x}C_{3x-1}} + {^{40 -6x}C_{8x-10}} $ is ,

The domain of the function $f(x) =\sqrt{\log_{16} \, x^2}$ is

The domain of the function $f (x) = \log_e(x - [x]) $ is :

The objective function in the above question is

The smallest integer function $f x ) = [x]$ is

Most electropositive metals are obtained from their ores by

Pure hydrogen is obtained by carrying electrolys is of

The hydrogen electrode is dipped in a solution of pH = 3 at 25$^\circ$C. The potential of the cell would be (the value of 2.303 RT/F is 0.059 V)

Pick out the wrong statement (s) . (i) Vapour pressure of a liquid is the measure of the strength of intermolecular attractive forces. (ii) Surface tension of a liquid acts perpendicular to the surface of the liquid. (iii) Vapour pressure of all liquids is same at their freezing points. (iv) Liquids with stronger intermolecular attractive forces are more viscous than those with weaker intermolecular force.

Surface tension does not vary with