Recent questions tagged medium

Find the common tangent of $x^2+y^2=4$ and $2x^2+y^2=2$.

asked Feb 7, 2014 by sreemathi.v

1 answer

The electric field on the axis of a dipole of dipole moment $\;\overrightarrow{P}\;$ at a distance x from the line joining the charges and $\;(x > > d)\;$

asked Feb 7, 2014 by yamini.v

1 answer

Find the equation of director circle for ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$?

asked Feb 7, 2014 by sreemathi.v

1 answer

Calculate the shortest and longest wavelength in H spectrum of Lyman series. $R_H = 109678 cm^{-1}$

asked Feb 7, 2014 by sharmaaparna1

1 answer

The ecentricity of an ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$ whose latus rectum is half to its major axis is e.Find the value of e?

asked Feb 7, 2014 by sreemathi.v

1 answer

A tailor purchased 125 meter of cloth. To stitch one dress he needs 2.25 meter. How many dresses can he stitch using 125 meter of cloth? Will there be any cloth left over? If so how much?

asked Feb 7, 2014 by fingeazy

1 answer

Anitha's mother, who is a baker, uses 1/4 cup of oil to bake one cake. If the oil can she buys has 8 cups of oil, how many cakes can she bake with the oil?

asked Feb 7, 2014 by fingeazy

1 answer

Find the length of lactus rectum and end points of lactus rectum for a ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$?

asked Feb 7, 2014 by sreemathi.v

1 answer

There are four concentric shells A , B , C ,D of radii a , 2a ,3a and 4a respectively . Shells B and D are given charges +q and -q respectively . Shell C is now earthed . The potential difference $\;V_{A}-V_{C}\;$ is

asked Feb 7, 2014 by yamini.v

1 answer

If the radius of first Bohr orbit of hydrogen atom is 'x' then de Broglie wavelength of electron in $3^{rd}$ Orbit is nearly

asked Feb 7, 2014 by sharmaaparna1

1 answer

Priya loves to have cereal for her breakfast. Every day she eats 3/4 cup of cereal for her breakfast. If the cereal box has 11 cups of cereal, how many days can she have them for her breakfast?

asked Feb 7, 2014 by fingeazy

1 answer

For what value of $\lambda$ does the line $y=x+\lambda$ touches the ellipse $\large\frac{x^2}{36}+\frac{y^2}{25}$$=1$?

asked Feb 7, 2014 by sreemathi.v

1 answer

If the electric potential of the inner shell is 10V and that of the outer shell is 5V , then the potential at the centre will be

asked Feb 7, 2014 by yamini.v

1 answer

How many times does light travel faster in vaccum than an electron in Bohr first orbit of hydrogen atom?

asked Feb 7, 2014 by sharmaaparna1

1 answer

Find the condition of tangency for a line $y=mx+c$ touches the ellipse

asked Feb 7, 2014 by sreemathi.v

1 answer

Potential difference between centre and surface of the sphere of radius R and $\rho$ uniform volume charge density within it will be

asked Feb 7, 2014 by yamini.v

1 answer

Imagine an atom made up of proton and a hypothetical particle of double the mass of electron but having the same charge as the electron . Apply the Bohr's atomic model and consider all possible transitions of this hypothetical particle to the first excited level. The largest wavelength photon that will be emitted has wavelength $\lambda$ (given in terms of the Rydberg constant R for the hydrogen atom) equal to.

asked Feb 7, 2014 by sharmaaparna1

1 answer

Find all values of m for which $y-e^{mx}$ is solution of equation $y'''-2y''-y'+2y=0$

asked Feb 7, 2014 by meena.p

1 answer

Find the equation of the ellipse referred to its centre whose minor axis is equal to the distance between the foci and whose latus is 10?

asked Feb 7, 2014 by sreemathi.v

2 answers

Three concentric matallic shells A , B and C of radii R , 2R and 3R have surface charge densities $\;\sigma , -\sigma\;and\;\sigma\;$ respectively . Find the potential difference between A & C

asked Feb 7, 2014 by yamini.v

1 answer

Which of the following satisfy differential equation $(1- \sin x) ^2 y''=\cos x$

asked Feb 7, 2014 by meena.p

1 answer

The total energy of the electron of H-atom in the Second quantum State is $E_2$. The total energy of the ${He^+}$ atom in the third quantum state is

asked Feb 7, 2014 by sharmaaparna1

1 answer

Find the length of major and minor axes of the ellipse $3x^2+2y^2=6$?Also find its eccentricity?

asked Feb 7, 2014 by sreemathi.v

1 answer

Two concentric conducting spheres of radii R and 2R are carrying charges Q and -2Q respectively . If the charge on inner sphere is doubled the potential difference between the two spheres will becomes

asked Feb 7, 2014 by yamini.v

1 answer

Four point charges $\;+1 \mu C ,+1 \mu C,-1 \mu C-1 \mu C\;$ are placed at the four consecutive corners of a square of side 0.1m . What is the magnitude of electric field at E as shown in figure .

asked Feb 7, 2014 by yamini.v

1 answer

Form a differential equation represent family of curve given by $y= (c_1+c_2) -\sin (x+c_3)-c_4 e^{x+c_5}$

asked Feb 7, 2014 by meena.p

1 answer

Two wires of resistivity $\rho 1$ and $\rho 2$ are connected in series. Equivalent resistivity of the combination is

asked Feb 6, 2014 by thanvigandhi_1

1 answer

Two identical batteries having emf 2.4 V and internal resistance 0.5$ \Omega$ are connected as shown. Potential Difference between A and B is

asked Feb 6, 2014 by thanvigandhi_1

1 answer

Solve : $ x \large\frac{dy}{dx}- \frac{y}{2}$$=x(\sin ^{-1}x) y^5$

asked Feb 6, 2014 by meena.p

1 answer

Find the solution : $ (1+x^4) \large\frac{dy}{dx}$$-4x^3y =(x^5+x) \tan ^{-1} (x^2) \qquad y(1)=\pi$

asked Feb 6, 2014 by meena.p

1 answer

A charge Q is placed at a distance $\;\large\frac{a}{2}\;$ above the centre of a horizontal , square surface of edge a as shown in figure . Find the flux of the electric field through the square surface

asked Feb 6, 2014 by yamini.v

1 answer

Calculate the potential energy of the system shown in figure

asked Feb 6, 2014 by yamini.v

1 answer

Solve : $\large\frac{dy}{dx}$$=\sqrt {16 x^2 y -4x^2 y^2}\qquad y(2)=1$

asked Feb 6, 2014 by meena.p

1 answer

Solve : $(x^2+1) dy =(4x+xy^2)dx$

asked Feb 6, 2014 by meena.p

1 answer

Solve : $e^x y dx=(e^{2x}+1) dy \quad y \cos =1$

asked Feb 6, 2014 by meena.p

1 answer

Find solution : $\large\frac{dy}{dx} $$= 1+ \sqrt {y-x+3}$

asked Feb 6, 2014 by meena.p

1 answer

Find solution : $\large\frac{dy}{dx}$$=y (x^2y^2-1)$

asked Feb 6, 2014 by meena.p

1 answer

An infinite number of charges each numerically equal to q and of the same sign are placed along the x-axis at $\;x=1 ,2 ,4 ,8----\;.$ Find elctric potential at $\;x=0$

asked Feb 6, 2014 by yamini.v

1 answer

Two point charges $\;q_{1}$ and $\;q_{2}$ are placed at a certain distance d from each other . The interacting force between them is F . Now both charges kept in oil of relative permittivity 5 . What is the new value of force between them

asked Feb 6, 2014 by yamini.v

1 answer

At a certain distance from a point charge , the field intensity is $\;500 V/m\;$ and the potential is 1500 V . The magnitude of charge is

asked Feb 6, 2014 by yamini.v

1 answer

Determine functions $y= 2e^{-x}+ 3e^{2x}$ is solution to which of following differential equation

asked Feb 6, 2014 by meena.p

1 answer

Find curve in $x-y$ plane which passes through$(1,1)$ . Intersects line $y=x$ at right angle at that point and satisfies $xy''+2y''=0$

asked Feb 6, 2014 by meena.p

1 answer

An electrical charge $\;4\times10^{-8} C\;$ is placed at the point $\;(2 ,3 ,5)\;.$ At the point $\;(5 , 3, 1) m \;$ electric field vector will be

asked Feb 6, 2014 by yamini.v

1 answer

Sodium atom emits light with a wavelength of 330nm when an electron moves from a 4p orbital to a 3s orbital. what is the energy difference between the orbitals in KJ/mol?

asked Feb 6, 2014 by sharmaaparna1

1 answer

Find the equation of tangent to the parabola $(y-6)^2=4a(x-p)$ at $(at^2,2at)$?

asked Feb 6, 2014 by sreemathi.v

1 answer

If the potential at the centre of a uniformly charged hollow sphere of radius R is V then electric field at a distance r from the centre of sphere will be $\;(r > R)$

asked Feb 6, 2014 by yamini.v

1 answer

An argon laser emits blue light with a wavelength of 488.0nm. How many photon are emitted by this laser in 2.00 sec,operating a power of 515 milliwatts?(one watt = 1J$S^{-1}$)

asked Feb 6, 2014 by sharmaaparna1

1 answer

Find the locus of the points of intersection of the mutually perpendicular tangents to a parabola?

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the magnitude of net electric field at the centre of square having charges arranged as shown in figure

asked Feb 6, 2014 by yamini.v

1 answer

Find the equation of parabola whose vertex is (4,2) and focus is (6,2)?

asked Feb 6, 2014 by sreemathi.v

1 answer

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