Recent questions tagged medium

What should be the value of angle $\theta$ so that light entering normally through the surface AC of a prism of refractive index $(n= \large\frac{3}{2})$ does not cross the second refracting surface AB.

asked Feb 12, 2014 by meena.p

1 answer

A ray of light is incident on a transparent glass slab of refractive index $1.62$ . If the reflected and refracted rays are mutually perpendiculars, what is angle of incidence?

asked Feb 11, 2014 by meena.p

1 answer

Light is incident formals on as oil at an incident angle of $30^{\circ}$ After moving through the oil -1, oil-2, and glass it exters water . If the refraction index of glass and water are 1.5 and 1.3 respectively . Then the angle which the ray makes with normal in water .

asked Feb 11, 2014 by meena.p

1 answer

Find the position of a point (2,3) with respect to circle $x^2+y^2+4x+4y+4=0$

asked Feb 11, 2014 by sreemathi.v

1 answer

A light ray is incident on a glass sphere at angle of incidence $60^{\circ}$ as shown. then the total deviation after two refraction is :

asked Feb 11, 2014 by meena.p

1 answer

Find the shortest and largest distance from the point (2,-7) to the circle $x^2+y^2-14x-10y-151=0$.

asked Feb 11, 2014 by sreemathi.v

1 answer

If two tangents are drawn from a point on the circle $x^2+y^2=36$ to the circle $x^2+y^2=18$ then find the angle between the tangents.

asked Feb 11, 2014 by sreemathi.v

1 answer

The density of $3M$ solution of $Na_2S_2O_3$ is $1.25$ $g mL^{−1}$. Calculate the mole fraction of $Na_2S_2O_3$.

asked Feb 11, 2014 by sharmaaparna1

1 answer

Find the torque due to an external uniform electric field on a dipole of dipole moment $\;\overrightarrow{P}$

asked Feb 11, 2014 by yamini.v

1 answer

Find the parametric form of normal for the circle $x^2+y^2=a^2$

asked Feb 11, 2014 by sreemathi.v

1 answer

The density of 3M solution of $Na_2S_2O_3$ is 1.25 g $mL^{-1}$ Calculate the $\%$ by weight of $Na_2S_2O_3$.

asked Feb 11, 2014 by sharmaaparna1

1 answer

The maximum area of the triangle formed by the circle $x^2+y^2=a^2$ with two of its vertices are diametrically opposite points is?

asked Feb 11, 2014 by sreemathi.v

1 answer

$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of water required to make $1\;N$ solution from $2\; mL$ concentrated $HNO_3?\;(\text{Normality}_{HNO_3} = 15.78)$

asked Feb 11, 2014 by sharmaaparna1

1 answer

For the equation $(x-2)^2+(y-2)^2=4$ find the equation of tangent at $(2,4)$?

asked Feb 11, 2014 by sreemathi.v

1 answer

An isolated conducting sphere whose radius $\;R=1 m \;$ has a charge $\;q=\large\frac{1}{9}\; \mu C\;$ .The energy density at the surface of the sphere is

asked Feb 11, 2014 by yamini.v

1 answer

Find the equation of normal to the circle $(x-2)^2+(y-2)^2=4$ at $(2,4)$ ?

asked Feb 11, 2014 by sreemathi.v

1 answer

Find the equation of normal for the circle, $x^2+y^2+2gx+2fy+c=0$ at $(x_1,y_1)$

asked Feb 11, 2014 by sreemathi.v

1 answer

Find the equation of tangent at the point $p(x_1,y_1)$ to a circle $x^2+y^2+2gx+2fy+c=0$?

asked Feb 11, 2014 by sreemathi.v

1 answer

Discuss the position of the points (2,3) and(1,3) with respect to circle $x^2+y^2-4x+2y-11=0$?

asked Feb 11, 2014 by sreemathi.v

1 answer

The electrostatic potential due to the charge configuration at point P as shown in figure is $\;(b < < a)$

asked Feb 11, 2014 by yamini.v

1 answer

The abscissac of two points A and B are the roots of the equation $x^2+2ax-b^2=0$ and their ordinates are the roots of the equation $x^2+2px-q^2=0$.Find the equation and the radius of the circle with AB as diameter.

asked Feb 11, 2014 by sreemathi.v

1 answer

An object of length $2.5\;cm$ is placed at a $1.5\; f$ from a concave mirror where f is magnitude of focal length of mirror. The length of object is perpendicular to principal axis . Then which of following will be correct . (i) image is 5 cm long (ii) image is 10 cm long (iii) image is inverted (iv)image is erect

asked Feb 11, 2014 by meena.p

1 answer

Find the length of the intercept on the straight line $4x-3y-10=0$ by the circle $x^2+y^2-2x+4y-20=0$

asked Feb 11, 2014 by sreemathi.v

1 answer

Equation of tangent of circle whose centre is (0,0) at a point (2,2) which lie on circle?

asked Feb 11, 2014 by sreemathi.v

1 answer

The velocity of image will be :

asked Feb 11, 2014 by meena.p

1 answer

Find the equation of circle passing through (0,0) and (0,B)?

asked Feb 11, 2014 by sreemathi.v

1 answer

Find the area of equilateral triangle inscribed in the circle $x^2+y^2+2gx+2fy+c=0$?

asked Feb 11, 2014 by sreemathi.v

1 answer

Find the centre and radius of the circle $x^2+y^2-2x-4y=9$.

asked Feb 11, 2014 by sreemathi.v

1 answer

Where should an object be placed in from of a concave mirror of focal length 30 cm so that the image size is 5 times the object size?

asked Feb 11, 2014 by meena.p

1 answer

A tow truck drags a stationary car along the road. The chain makes an angle of 30 degrees with the road and the tension in the chain is 1500 N. How much work is done (in Joules) by the truck in pulling the car 1 km (approximate answer, rounded off)?

asked Feb 11, 2014 by balaji.thirumalai

1 answer

Two plane mirrors are inclined to each other such that a ray of light incident on first mirror and parallel to second is reflected from second mirror parallel to first mirror. Find angle between two mirrors.

asked Feb 11, 2014 by meena.p

1 answer

A Point source of light B is placed at a distance L in front of centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to mirror at a distance 2L from it as shown. Find greatest distance over which he can see the image of light source in mirror.

asked Feb 10, 2014 by meena.p

1 answer

Write equation of circle whose diametrically opposite point are (1,2) & (-1,-2) is?

asked Feb 10, 2014 by sreemathi.v

1 answer

Minimum size of plane mirror, required to see full image of an observer is :

asked Feb 10, 2014 by meena.p

2 answers

The radius of a circle with it's center at $(2,1)$ and whose one chord is the diameter of the circle $x^2+y^2-2x-6y+6=0$ is:

asked Feb 10, 2014 by sreemathi.v

1 answer

Evaluate: $\large \int \limits_{-1}^1 $$x$ $ \left | x \right |$ $ dx$.

asked Feb 10, 2014 by rvidyagovindarajan_1

1 answer

Find the equation of an rectangular hyperbola whose centre is origin and its asymptotes coincide with the co-ordinate axes?

asked Feb 10, 2014 by sreemathi.v

1 answer

Find the equation of asymptotes for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?

asked Feb 10, 2014 by sreemathi.v

1 answer

Find the locus of intersection of two perpendicular tangent to the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?

asked Feb 10, 2014 by sreemathi.v

1 answer

Two identical charges are placed at the two corners of an equilateral triangle . The potential energy of the system is $\;\sqcup\;.$ The work done in bringing an identical charge from infinity to the third vertex is

asked Feb 10, 2014 by yamini.v

1 answer

Find the equation of chord of contact for hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?

asked Feb 10, 2014 by sreemathi.v

1 answer

The hydrogen-like species $Li^{2+}$ is in a spherically symmetric state $S_1$ with one radial node. Upon absorbing light the ion undergoes transition to a state $S_2$ has one radial node and its energy is equal to the ground state energy of hydrogen atom. Energy of the state $S_1$ in units of the hydrogen atom ground state energy is

asked Feb 10, 2014 by sharmaaparna1

1 answer

Find the equation of normal for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?

asked Feb 10, 2014 by sreemathi.v

1 answer

Find the equation of normal to the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ at $(x_1,y_1)$ ?

asked Feb 10, 2014 by sreemathi.v

1 answer

Find the equation of tangent for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$ in parametric form?

asked Feb 10, 2014 by sreemathi.v

1 answer

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

asked Feb 10, 2014 by sreemathi.v

1 answer

Which of these is correct for each pair of statements? \[\] Statement 1: $40W$ tube light appears brighter than a $40W$ bulb.\[\] Statement2: Light sources having same power rating appear to glow equally brightly

asked Feb 10, 2014 by thanvigandhi_1

1 answer

For the equation to represent the hyperbola $\large\frac{x^2}{9-\lambda}+\frac{y^2}{6-\lambda}$$=1$ what should be the value of $\lambda$?

asked Feb 10, 2014 by sreemathi.v

1 answer

De-Broglie proposed dual nature for electron by putting his famous equation $\lambda = \large\frac{h}{mu}$. Later on Heisenburg proposed uncertainity principle as $\bigtriangleup p .\bigtriangleup x \geq \large\frac{h}{2}(h = \large\frac{h}{2\pi})$ . On the contrary particle nature of electron was established on the basis of photoelectric effect. When a photon strikes the metal surface , it gives up its energy to the electron. Part of this energy (say w) is used by the electron to escape from the metal and the remaining imparts the kinetic energy $\large\frac{1}{2}mu^2$ to the photoelectron. The potential applied on the surface to reduce the velocity of photoelectron to zero is known as stopping potential. The binding energy of electron in a metal is 250 KJ/mol. The threshold frequency of metal is

asked Feb 10, 2014 by sharmaaparna1

1 answer

For what value of $\lambda$ does the line $y=2x+\lambda$ touches the hyperbola $16x^2-9y^2=144$?

asked Feb 10, 2014 by sreemathi.v

1 answer

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