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Recent questions tagged medium

Calculate the wavelength of a helium atom whose speed is equal to root mean square speed at 293 K $(rms = \sqrt{3RT/m})$

asked Feb 4, 2014 by sharmaaparna1

1 answer

If the lines $\overrightarrow r=(\hat i+2\hat j+3\hat k)+\lambda(3\hat i+2k\hat j-2\hat k)$ and $\overrightarrow r=(\hat i+2\hat j+3\hat k)+\mu(k\hat i+\hat j+5\hat k)$ are $\perp$ to one another then find the equation of the plane containing them.

asked Feb 4, 2014 by rvidyagovindarajan_1

1 answer

The wavelength of $\beta$ line of the Balmer Series is $4815 A^{\large\circ}$. What is the wavelength of $\alpha$ line of balmer Series of the same atom?

asked Feb 4, 2014 by sharmaaparna1

1 answer

Solution of differential equation : $y(2xy+e^x)dx=e^xdy$

asked Feb 4, 2014 by meena.p

1 answer

A charge q is distributed uniformly on the surface of a sphere of radius R . It is covered by a concentric hollow conducting sphere of radius 2R . Find the charges on the outer surface of hollow sphere if it is earthed

asked Feb 4, 2014 by yamini.v

1 answer

A certain laser transition emits $6.37\times10^{15}$ quants per second per square meter. Calculate the power out put in joule per square metre per second. Given $\lambda$ = 632.8 nm.

asked Feb 4, 2014 by sharmaaparna1

1 answer

If p is the length of the perpendicular from the origin to the line $\large\frac{x}{a}+\frac{y}{6}$$=1$ then $\large\frac{1}{a^2}+\frac{1}{b^2}$=?

asked Feb 4, 2014 by sreemathi.v

1 answer

Find the joint equation of lines $x+y+1=0$ & $x+y-1=0$

asked Feb 4, 2014 by sreemathi.v

1 answer

Find a point such that it divides the line joining the points A(1,1) & B(3,3) in 2 : 3 ratio?

asked Feb 4, 2014 by sreemathi.v

1 answer

General solution of differential equation: $\large\frac{dy}{dx}$$+x \sin 2y=x^3 \cos ^2 y$

asked Feb 4, 2014 by meena.p

1 answer

If $ax+y-1=0$ ,$x+ay=0,x+y+a=0$ are concurrent then the value of $a^3-1$ is

asked Feb 4, 2014 by sreemathi.v

1 answer

If the points (1,1) and (3,5) were to be on the opposite side of the line $3x-5y+a=0$.Find the value of a?

asked Feb 4, 2014 by sreemathi.v

1 answer

General solution of differential equation: $x \large\frac{dy}{dx}$$+y=x^3 y^6$

asked Feb 4, 2014 by meena.p

1 answer

$A(1,2)$ & $B(7,6)$ are the two opposite points of straight line (i.e) these two points are on opposite side of a straight line then find a equation of straight line which is equidistant from these two points and also AB is perpendicular to the straight line.

asked Feb 4, 2014 by sreemathi.v

1 answer

Find the vertices of the square if one of its vertices is (1,1) and the square passes through origin?

asked Feb 4, 2014 by sreemathi.v

1 answer

A disc having a uniform charge density $\;\sigma\;$ and radius $\;R\;$ is placed on $\;x-y\;$ plane with centre at the origin . Find the electric potential at a point on z - axis at a distance $\;10 m\;$ from centre . $\;\sigma=16\;\in_{0}\;,R=1 m$

asked Feb 4, 2014 by yamini.v

1 answer

Find the equation of line parallel to $3x-4y+2=0$ and at a distance 2 from it?

asked Feb 4, 2014 by sreemathi.v

1 answer

Find the equation of the line through (1,2) so that the segment of line intercepted between the axes is bisected at this point?

asked Feb 4, 2014 by sreemathi.v

1 answer

Two point charges $\;q_{1}=q_{2}=2\;\mu C\;$ are fixed at $\;x_{1}= +3m \;and\;x_{2}=-3m\;$ as shown in figure . A third particle of mass 1g and charge $\;q_{3}=-4\;\mu C\;$ are released from rest at $\;y=4m \;$. Find the speed of the particle as it reaches the origin .

asked Feb 4, 2014 by yamini.v

1 answer

The vertices of a triangle are $A(10,4),B(-4,9)$ and $C(-2,-1)$.Find the equation of the altitude through A?

asked Feb 4, 2014 by sreemathi.v

1 answer

The angle between two lines is $\large\frac{\pi}{4}$ and the slope of one of them is $\large\frac{1}{4}$ and other is $x$.Find the value of $x$.

asked Feb 4, 2014 by sreemathi.v

1 answer

Find whether the point $A(1,2),B(3,6)$&$C(5,10)$ are collinear or not?

asked Feb 4, 2014 by sreemathi.v

1 answer

The electric field in a region is given by $\;\overrightarrow{E}=\alpha\;x^2 \hat{i}\; $ Here $\;\alpha\;$ is a constant of proper dimensions . Find the total flux passing through a cube bounded by the surfaces . $x=l\;,x=2l\;,y=0\;,y=-l\;,z=0\;,z=l\;.$

asked Feb 4, 2014 by yamini.v

1 answer

A uniform electric field of 100 V/m is directed at $30^{0}$ with the +ve x - axis as shown in figure . Find the potential difference $\;V_{BA}\;$ if OA=2 m and OB= 4 m

asked Feb 4, 2014 by yamini.v

1 answer

Two identical balls having a mass m and small radii and having equal charge q are suspendended from common point by two insulating strings of equal length l . In equilibrium each string makes an angle $\;\theta\;$ with the vertical . If $\;\theta=45^{0}\;find\;l^2$ in terms of q and m

asked Feb 4, 2014 by yamini.v

1 answer

General solution of differential equation : $(1+y^2)dx =(\tan^{-1}y -x)dy$

asked Feb 4, 2014 by meena.p

1 answer

General solution of differential equation ; $\large\frac{ydy}{xdx}+\frac{2(x^2+y^2)-1}{(x^2+y^2+1)}=0$

asked Feb 4, 2014 by meena.p

1 answer

The equivalent resistance between the terminals A and D of the following circuit is:

asked Feb 3, 2014 by thanvigandhi_1

1 answer

If O be the origin and the coordinates of P be (1, 2, – 3), then find the equation of the plane passing through P and perpendicular to OP.

asked Feb 3, 2014 by rvidyagovindarajan_1

1 answer

In the circuit shown, the steady state potential drop across the capacitor must be

asked Feb 3, 2014 by thanvigandhi_1

1 answer

In the circuit shown, the current passing through the:

asked Feb 3, 2014 by thanvigandhi_1

1 answer

Consider the charging of a capacitor. Let $Q_1$ be the charge given to it in first t seconds and $Q_2$ be the charge given to it in the next t seconds. Also, let $t_1$ be the time required to deposit a charge Q (less than half the maximum charge) and $t_2$ be the time required to deposit an additional charge of Q, then:

asked Feb 3, 2014 by thanvigandhi_1

1 answer

In an electric circuit containing a battery, the charge (positive by convention) inside the battery

asked Feb 3, 2014 by thanvigandhi_1

1 answer

If the sum of two unit vector is a unit vector, then what is the angle between them?

asked Feb 3, 2014 by rvidyagovindarajan_1

1 answer

General solution of differential equation : $ (1-x^2)(1-y)dx -xy (1+y) dy=0$

asked Feb 3, 2014 by meena.p

1 answer

One mole of the complex compound $CO(NH_3)_5Cl_3$ gives 3 moles of ions on dissolution in water.On a mole of the same complex reacts with 2 moles of $AgNO_3$ solution to yield 2 moles of $AgCl(s)$.The structure of complex is

asked Feb 3, 2014 by sreemathi.v

1 answer

Coordination compound have great importance in biological system .In this content which of the following statement is incorrect

asked Feb 3, 2014 by sreemathi.v

1 answer

The coordination number of central metal atom in a complex is determined by

asked Feb 3, 2014 by sreemathi.v

1 answer

$[Cr(H_2O)_5Cl]SO_4$ and $[Cr(H_2O)_5SO_4]Cl$ are

asked Feb 3, 2014 by sreemathi.v

1 answer

Which of the following is true for the complexes $[Ni(CN)_4]^{2-}$ and $[NiCl_4]^{2-}$

asked Feb 3, 2014 by sreemathi.v

1 answer

Which of the following facts about the complex $[Cr(NH_3)_6]Cl_3$ is wrong

asked Feb 3, 2014 by sreemathi.v

1 answer

General solution of differential equations: $e^y dx+(xe^y-2y)dy=0$

asked Feb 3, 2014 by meena.p

1 answer

Which one of the following has an optical isomer

asked Feb 3, 2014 by sreemathi.v

1 answer

Which of the following pairs represents linkage isomers :

asked Feb 3, 2014 by sreemathi.v

1 answer

Which of the following has an optical isomer

asked Feb 3, 2014 by sreemathi.v

1 answer

In which of the following octahedral complexes of CO(at.no=27),will be magnitude of $\Delta_0$ be the highest

asked Feb 3, 2014 by sreemathi.v

1 answer

The coordination number and the oxidation state of the element 'E' in the complex $[E(en)_2(C_2O_4)]NO_2$ when 'en' is ethylenediamine

asked Feb 3, 2014 by sreemathi.v

1 answer

Identify the correct order of solubility of $Na_2S, CuS$ and $ZnS$ in aqueous solution

asked Feb 1, 2014 by mosymeow_1

1 answer

The reagent $NH_4Cl$ and aqueous $NH_3$ will precipitate

asked Feb 1, 2014 by mosymeow_1

1 answer

Potassium ferrocyanide is used in the detection of

asked Feb 1, 2014 by mosymeow_1

1 answer

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