Recent questions tagged class11

Find the equation of straight line touching both $x^2+y^2=2$ and $y^2=8x$.

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the value of $\lambda$ such that $\Delta =0$ for the equation $x^2+y^2-3x+2y+\lambda=0$

asked Feb 5, 2014 by sreemathi.v

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Find the equation of normal for the parabola $y^2=4ax$ in parametric form

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the equation of tangent at $(x_1,y_1)$ for the parabola $y^2=4ax$?

asked Feb 5, 2014 by sreemathi.v

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Equation of normal for the parabola $y^2=4ax$ at point $(x_1,y_1)$ is

asked Feb 5, 2014 by sreemathi.v

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Find the coordinate of double ordinate of parabola $y^2=4ax$?

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the equation of parabola whose focus (-4,0) & vertex (0,0)?

asked Feb 5, 2014 by sreemathi.v

1 answer

The energy required for the ionisation of a certain atom is $3.44\times10^{-18}J$. The absorption of a photon of unknown wavelength ionises the atom and ejects an electron with velocity $1.03\times10^6$ m/sec. Calculate the wavelength of the incident radiation.

asked Feb 5, 2014 by sharmaaparna1

1 answer

Find the tangent at the parametric coordinate of parabola $y^2=4ax$?

asked Feb 5, 2014 by sreemathi.v

1 answer

Calculate the wavelength of the first line and the series limit for the Lyman series for hydrogen.(Series limit is for the case when $n_2 = \infty)$

asked Feb 5, 2014 by sharmaaparna1

1 answer

Find the vertex of parabola $x^2+4x+4-y=0$

asked Feb 5, 2014 by sreemathi.v

1 answer

An electron difraction experiment was performed with a beam of electrons accelerated by a potential difference of 10.0kV.What is the wavelength of the electron beam?(1KV = 1000V = 1000eV for the electron)

asked Feb 5, 2014 by sharmaaparna1

1 answer

Find the axis,vertex,focus & equation of directrix for the parabola $y^2=4ax$?

asked Feb 5, 2014 by sreemathi.v

1 answer

A proton is accelerated to one tenth of the velocity of light. Suppose velocity can be measured with a precision of $\pm1\%$, what can be the uncertainity in its position?

asked Feb 5, 2014 by sharmaaparna1

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A straight line drawn perpendicular to the axis and terminated at both end of the curve is a _________________ of the parabola.

asked Feb 5, 2014 by sreemathi.v

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What is the conic represent $x^2+2x+y+1=0$

asked Feb 5, 2014 by sreemathi.v

1 answer

The speed of a certain proton is $4.5\times10^5m$ If the uncertainity is to be reduced to 0.01percent, what uncertainity in its location must be tolerated?

asked Feb 5, 2014 by sharmaaparna1

1 answer

For the equation $ax^2+2hxy+by^2+2gx+2fy+c=0$ to be parabola what should be the conditions?

asked Feb 5, 2014 by sreemathi.v

1 answer

Two particles A and B are in motion . if the wavelength associated with particle A is $5\times10^{-8}$m.Calculate the wavelength associated with particle B if its momentum is half of A.

asked Feb 5, 2014 by sharmaaparna1

1 answer

e(ecentricity)=__________ for parabola.

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the equation of straight line which passes through the intersection of the lines $3x-4y+1=0$ and $5x+y-1=0$ and $(2,1)$?

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the area of rhombus formed by the lines $x\pm y\pm 1=0$?

asked Feb 5, 2014 by sreemathi.v

2 answers

Find the separate equations of the lines represented by the equation $x^2-6xy+8y^2=0$?

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the image of the point $(2,2)$ with respect to the line $x+y+2=0$.

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the coordinates of foot of the perpendicular drawn from the point (2,3) to the line $x+y+1=0$.

asked Feb 5, 2014 by sreemathi.v

1 answer

Find the orthocentre of $\Delta ABC$ whose vertices are $A(0,1),B(-1,0),C(1,0)$.

asked Feb 5, 2014 by sreemathi.v

1 answer

The extremities of the diagonal of a square are (1,1) & (-1,-1).Obtain two vertices and equation of diagonal.

asked Feb 5, 2014 by sreemathi.v

1 answer

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

Find the equation of a straight line on which the perpendicular from the origin makes an angle of $45^{\large\circ}$ with x-axis and which forms a triangle of area 18 sq.units with the coordinate axes

asked Feb 4, 2014 by sreemathi.v

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

Find acute as well as obtuse angular bisectors of the lines $x+3y+1=0$ & $2x+5y+2=0$.

asked Feb 4, 2014 by sreemathi.v

1 answer

AIR services on vividh Bharti is transmitted on 219m band.What is its transmission frequency in Hertz.

asked Feb 4, 2014 by sharmaaparna1

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

A vertex of an equilateral triangle is (1,1) and the opposite side is $x+y+1=0$.Find the equations of other sides?

asked Feb 4, 2014 by sreemathi.v

1 answer

A photon of 300nm is absorbed by a gas and then re-emits two photons. One re-emitted photon has wavelength 496nm. Calculate energy of other photon re-emitted out.

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

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

$A(1,2)$ & $B(7,6)$ 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

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

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

Find the distance between two points (5,6) & (10,12)?

asked Feb 4, 2014 by sreemathi.v

1 answer

The image of the point (4,-3) with respect to the line $y=x$ is :

asked Feb 4, 2014 by sreemathi.v

1 answer

Find the equations of the bisectors of the angles between the straight lines $3x-4y+6=0$ and $12x+5y-3=0$.

asked Feb 4, 2014 by sreemathi.v

1 answer

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