Recent questions tagged class11

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

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

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

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

asked Feb 7, 2014 by sreemathi.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 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

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

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When a hydrogen atom emits a photon of energy 12.1eV, the orbital angular momentum changes by

asked Feb 7, 2014 by sharmaaparna1

1 answer

Find the equation of an ellipse whose focus is $(-1,1)$ eccentricity is $\large\frac{1}{2}$ and the directix is $x-y+3=0?$

asked Feb 7, 2014 by sreemathi.v

1 answer

Find the position of the point (4,-3) relative to the ellipse $5x^2+7y^2=140$?

asked Feb 7, 2014 by sreemathi.v

1 answer

Find the parametric form of normal for the ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$?

asked Feb 7, 2014 by sreemathi.v

1 answer

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

asked Feb 7, 2014 by sreemathi.v

1 answer

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

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the parametric form of tangent for the ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}=$$1$

asked Feb 6, 2014 by sreemathi.v

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Find the coordinate of double ordinate for the ellipse $\large\frac{x^2}{a^2}+\large\frac{y^2}{b^2}$$=1$

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the vertex and focus of the parabola $\large\frac{x^2}{64}+\frac{y^2}{100}$=1.

asked Feb 6, 2014 by sreemathi.v

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Find the position of the point (1,1) relative to the ellipse $\large\frac{x^2}{64}+\frac{y^2}{100}$=1.

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the eccentricity of ellipse $\large\frac{x^2}{64}+\frac{y^2}{100}=1$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Name the axes are their in the ellipse

asked Feb 6, 2014 by sreemathi.v

1 answer

A ellipse is the locus of a point which moves in a plane such that its distance from a fixed point (i.e focus) is a constant ratio from a _____________

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the length of tangent,subtangent,normal and subnormal to $y^2=4ax$ at $(at^2,2at)$

asked Feb 6, 2014 by sreemathi.v

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What is the ratio of the Rydberg constant for helium to hydrogen atom?

asked Feb 6, 2014 by sharmaaparna1

1 answer

What is energy per mol of photons of FM radiowaves with V=102.5 MHZ ?

asked Feb 6, 2014 by sharmaaparna1

1 answer

If the normal to a parabola $y^2=4ax$ make an angle $\theta$ with the axis and $\phi$ is the angle it makes when it cut the parabola again find the relation between $\theta$ & $\phi$?

asked Feb 6, 2014 by sreemathi.v

1 answer

The dissociation energy of $H_2$ is 430.53KJ. If $H_2$ is exposed to light energy of wavelength 253.7 nm , what $\%$ of light energy will be converted into kinetic energy?

asked Feb 6, 2014 by sharmaaparna1

1 answer

Find the vertex,lactus rectum,axis and the directix of the parabola $(y-2)^2=4(x-1)$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the area of triangle inscribed in the parabola $y^2=4ax$ with vertices $(x_1,y_1),(x_2,y_2)$ & $(x_3,y_3)$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Calculate the maximum wavelength in $A^{\large\circ}$ a photon that can initiate the reaction. $Cl_2(g)\rightarrow 2cl(g), \bigtriangleup H = 247$ KJ/mol

asked Feb 6, 2014 by sharmaaparna1

1 answer

Find the centroid of the triangle formed by the feet of the three normal lies on the axis of parabola?

asked Feb 6, 2014 by sreemathi.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

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

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the length of lactus Rectum for the parabola $y^2=4ax$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the area of triangle by tangents at the point $P(at_1^2,2at_1)$ & $Q(at_2^2,2at_2)$ for the parabola $y^2=4ax$ .

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the point of intersection of tangents at any two points on the parabola $y^2=4ax$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the point of intersection of normals at any two points on the parabola $y^2=4ax$

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the relation between $'t_1'$ meets the parabola again at $'t_2'$ for the parabola $y^2=4ax$?

asked Feb 6, 2014 by sreemathi.v

1 answer

Show that normal to the parabola $y^2=4x$ at the point (1,2) meet it again at some point of parabola, find the point?

asked Feb 6, 2014 by sreemathi.v

1 answer

Which of the following does not represent Charle's law?

asked Feb 5, 2014 by balaji

1 answer

Which of the following does not represent Boyle's law?

asked Feb 5, 2014 by balaji

3 answers

An oxide of nitrogen at NTP has a density equal to another oxide of Nitrogen at $12^{\circ}$. If we consider pressure conditions to be the same, what are the two oxides involved?

asked Feb 5, 2014 by balaji

1 answer

At $0^{\circ}$, the density of carbon-di-oxide is the same as that of an oxide of nitrogen. The oxide of nitrogen is which of the following, considering the pressure conditions to be the same?

asked Feb 5, 2014 by balaji

1 answer

In a closed container, if we increase the temperature of the vessel, the pressure also increases due to:

asked Feb 5, 2014 by balaji

1 answer

According to Maxwell's distribution of velocities, with an increase in temperature, which of the following is true?

asked Feb 5, 2014 by balaji

1 answer

Find the conditions for a co-normal point (h,k) of a parabola $y^2=4ax$

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the equation of common tangent to the parabola $y^2=4x$ and $x^2=4y$?

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the area of $\Delta ABC$ where AC is focal chord of the parabola $y^2=4ax$ & B is the vertex of parabola $y^2=4ax$?

asked Feb 5, 2014 by sreemathi.v

1 answer

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